Method and apparatus for communication based on frame structure

ABSTRACT

The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-Generation (4G) communication system such as long term evolution (LTE). The method for operating a user equipment (UE) in a wireless communication system is provided. The method includes detecting a synchronization signal block, performing downlink synchronization process according to the detected synchronization signal block, and determining time-frequency resources of an anchor subband; acquiring random access configuration information according to the time-frequency resources of the anchor subband, performing a random access process according to the random access configuration information, and completing uplink synchronization; and acquiring control information in a control channel band, and performing data communication with a base station in the data transmission band according to the control information.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a 371 National Stage of International ApplicationNo. PCT/KR2018/007582, filed Jul. 4, 2018, which claims priority toChinese Patent Application No. 201710539017.8, filed Jul. 4, 2017,Chinese Patent Application No. 201810029413.0, filed Jan. 11, 2018, andChinese Patent Application No. 201810105219.6, filed Feb. 1, 2018, thedisclosures of which are herein incorporated by reference in theirentirety.

BACKGROUND 1. Field

This disclosure generally relates to wireless communication systems.More specifically, this disclosure relates to a method and apparatus forcommunication based on a frame structure, a method and apparatus fordetermining random access preamble transmit power, a user equipment(UE), a base station and a computer readable medium related thereto.

2. Description of Related Art

To meet the demand for wireless data traffic having increased sincedeployment of 4^(th) generation (4G) communication systems, efforts havebeen made to develop an improved 5^(th) generation (5G) or pre-5Gcommunication system. Therefore, the 5G or pre-5G communication systemis also called a ‘Beyond 4G Network’ or a ‘Post Long Term Evolution(LTE) System’.

The 5G communication system is considered to be implemented in higherfrequency (mmWave) bands, e.g., 28 GHz or 60 GHz bands, so as toaccomplish higher data rates. To decrease propagation loss of the radiowaves and increase the transmission distance, the beamforming, massivemultiple-input multiple-output (MIMO), Full Dimensional MIMO (FD-MIMO),array antenna, an analog beam forming, large scale antenna techniquesare discussed in 5G communication systems.

In addition, in 5G communication systems, development for system networkimprovement is under way based on advanced small cells, cloud RadioAccess Networks (RANs), ultra-dense networks, device-to-device (D2D)communication, wireless backhaul, moving network, cooperativecommunication, Coordinated Multi-Points (CoMP), reception-endinterference cancellation and the like.

In the 5G system, Hybrid frequency shift keying (FSK) and quadratureamplitude modulation (FQAM) and sliding window superposition coding(SWSC) as an advanced coding modulation (ACM), and filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA), and sparse codemultiple access (SCMA) as an advanced access technology have beendeveloped.

With a rapid development of information industry, particularly theincreasing demand from the mobile Internet and the Internet of Things(IoT), the future mobile communication technology is challengedunprecedentedly. For example, according to the report ITU-R M. issued bythe International Telecommunication Union (ITU), it can be expectedthat, by 2020, mobile service traffic will grow nearly 1,000 times morethan that in 4G era, and the number of user equipment connections willalso exceed 17 billion, and with a vast number of IoT devices graduallyexpanding into the mobile communication network, the number of connectedequipments will be even more astonishing. In order to cope with thisunprecedented challenge, the communication industry and academia haveconducted extensive study on the fifth generation (5G) of mobilecommunications technology. Currently, in the report ITU-R M. from ITU,the framework and overall objectives of the future 5G have beendiscussed, where the demands outlook, application scenarios and variousimportant performance indexes of 5G have been described in detail. Interms of new demands in 5G, the report ITU-R M. from ITU providesinformation related to 5G technology trends, which is intended toaddress prominent issues such as significant improvement in systemthroughput, consistency of the user experience, scalability to supportIoT, delay, energy efficiency, cost, network flexibility, support fornew services and flexible spectrum utilization, etc.

Duplex mode in radio communication, which is importance foundation fordesigning an air interface in radio communication, refers to processingmode of bidirectional data communication for uplink and downlink, and isno exception in the development of 5G. Currently, Frequency DivisionDuplex (FDD) and Time Division Duplex (TDD) are two primary duplex modesand widely applied to the field of audio broadcasting, videobroadcasting and civil communication system, such as Long Term Evolution(LTE) system corresponding to Evolved Universal Terrestrial Radio Access(E-UTRA) protocol established by 3rd Generation Partnership Project(3GPP) and IEEE802.11A/g Wireless Local Area Net (WLAN).

In FDD mode, uplink and downlink perform communication by using pairedfrequency resource satisfying a certain duplex spacing; while in TDDmode, uplink and downlink share a same frequency resource, and uplinkcommunication and downlink communication are divided by different timeresource. Different duplex modes will result in different designs inphysical layer of air interface such as frame structure. Taking LTE asan example, two frame structures applicable to FDD mode and TDD mode arespecified in LTE.

In the FDD-mode frame structure as shown in FIG. 5, one radio frame of10-ms is composed of 10 subframes of 1-ms each of which is composed of 2time slots of 0.5-ms. Uplink communication and downlink communicationare performed on different frequency resources.

In the TDD-mode frame structure as shown in FIG. 6, similar to theFDD-mode frame structure, one radio frame of 10-ms is composed of 10subframes of 1-ms; unlike the FDD-mode frame structure, the uplinkcommunication and downlink communication in the TDD mode share samefrequency resources, which are distinguished by time resources. Forexample, in the configuration of FIG. 6, subframes 0 and 5 are used fordownlink communication, and subframes 2, 3, 4, 7, 8 and 9 are used foruplink communication. In order to ensure that the downlink communicationdoes not affect the uplink communication, a specific subframe isintroduced in the TDD-mode frame structure, namely subframes 1 and 6 inFIG. 6. The specific subframe is composed of 3 domains of Downlink PilotTime Slot (DwPTS), Guard Period (GP) and Uplink Pilot Time Slot (UpPTS).In the TDD-mode frame structure, subframes 1 and 5, and DwPTS are alwaysused for downlink transmission, while UpPTS and the subframes followingthe UpPTS are always used for uplink transmission. GP is a guard spacingbetween downlink communication and uplink communication, to ensure thatuplink data communication is not affected by downlink communication. TDDmode in LTE can be configured flexibly, to support unsymmetrical servicebetween uplink and downlink data communication. Table 1 shows variousTDD-mode configurations in a LTE, wherein the D represents that asubframe is used for downlink communication, the U represents that thesubframe is used for uplink communication, and S represents a specificsubframe.

TABLE 1 uplink-downlink configuration in TDD-mode in a LTE. Uplink-Downlink- downlink uplink config- switch uration periodicity Subframeindex 0 5 ms 1 5 ms 2 5 ms 3 10 ms 4 10 ms 5 10 ms 6 5 ms

Wherein, the above two duplex modes each has its own merits.Specifically, as for FDD mode, uplink and downlink data communicationare required to be performed on paired frequency bands, and pairing ofuplink and downlink frequency should be satisfied with a certain duplexspacing, which will easily result in spectrum fragments in terms ofspectrum division when 5G is developing toward high frequency and largebandwidth; while as for TDD mode, uplink and downlink data communicationare performed by using a same frequency band, thus the TDD mode isadvantageous in flexibility of frequency resources utilization, canprovide more support to asymmetrical service, and has a higher spectrumefficiency. As for FDD, since it is a paired spectrum, there are alwaysresources available in uplink and downlink resources, thus schedulingand terminal feedback of uplink control signaling can be more timely,for example, Acknowledge/Non-Acknowledge (ACK/NACK) information ofHybrid Automatic Retransmission Request (HARQ) and Channel stateinformation (CSI), so as to reduce feedback delay of air interface andimprove scheduling efficiency; while as for TDD, different uplink anddownlink slot configurations will result in more complicated relateddesign, in addition, since the TDD mode is advantageous in channelreciprocity of uplink and downlink, acquisition of CSI can be greatlysimplified.

Large-scale MIMO technology may be adopted in 5G to further improvespectrum efficiency, a great deal of antennas are provided at a basestation side, a great deal of resources are required for downlinkphysical channel training and feedback of channel state informationunder FDD mode, while overhead of training and feedback can be decreasedby using channel reciprocity under TDD mode, thus TDD mode is moreattractive for a large-scale MIMO technology. However, there is alsorequirement of low delay, thus it is required to further shortenTransmission Time Interval (TTI) of air interface and has more timelycontrol signaling, which will result in more complicated design of TDDmode.

As can be seen from the above analysis, each of FDD mode and TDD modehas its own merits, as facing diverse application scenes and usage of anew frequency band in 5G, it is necessary to design a new duplex mode,which incorporates merits of FDD mode and TDD mode both, in order toguarantee spectrum utilization of 5G and performance of network.

Since the duplex mode in LTE is inflexible, a paired spectrum isrequired for FDD mode, and both the scheduling process and the HARQprocess of TDD mode are quite complicated, if the current duplex mode isstill used, spectrum efficiency and performance of a system cannot beimproved further.

A random access process is an important step in a wireless communicationsystem, and is used for establishing uplink synchronization between aterminal and a base station, and for a base station to allocate an IDfor identifying a terminal, etc. The performance of the random accessdirectly affects experience at the terminal. For a traditional wirelesscommunication systems, such as Long Term Evolution (LTE) and Long TermEvolution-Advanced (LTE-A), the random access process is applied tomultiple scenarios, such as establishing an initial link, cell handover,re-establishing an uplink, Radio Resource Control (RRC) connectionre-establishment, etc., and is classified into Contention-based RandomAccess and Contention-free Random Access, based on whether or not theterminal occupies preamble resources exclusively. Since in theContention-based Random Access, terminals select respective preamblesfrom the same preamble resources in a process of trying to establishuplink links, several terminals may select the same preamble to betransmitted to the base station. Such a conflict may lead to a preambletransmission failure. How to design a random access preambleretransmission method to improve a success probability of the randomaccess preamble retransmission is a key factor that affects the randomaccess performance.

The Contention-based Random Access process in LTE-A includes four steps.Before the random access process starts, the base station transmitsconfiguration information of the random access process to the terminal,and the terminal performs the random access process according to thereceived configuration information.

In Step 1, the terminal randomly selects a preamble from a preambleresource pool and transmits it to the base station; the base stationperforms correlation detection on the received signal so as to identifythe preamble transmitted by the terminal.

In Step 2, the base station transmits a Random Access Response (RAR) tothe terminal, the RAR including a random access preamble identifier, atiming advance instruction determined based on delay estimation betweenthe terminal and the base station, a Temporary Cell-Radio NetworkTemporary Identifier (TC-RNTI), and time-frequency resources allocatedfor the next uplink transmission of the terminal.

In Step 3, the terminal transmits a Message 3 (MSg3 for short) to thebase station according to the information in the RAR. The MSg3 includesinformation, such as a terminal identifier for identifying a terminaland a RRC link request, etc. The terminal identifier is an identifierunique to the terminal for resolving conflicts.

In Step 4, the base station transmits a conflict resolution identifierto the terminal, including the terminal identifier of the terminal thatsurvives the conflict resolution. After detecting its own identifier,the terminal upgrades a Temporary Cell-Radio Network TemporaryIdentifier to a Cell-Radio Network Temporary Identifier (C-RNTI forshort), and transmits an Acknowledgement (ACK for short) signal to thebase station to complete the random access process, and then waits forscheduling by the base station; otherwise, the terminal will start a newrandom access process after a delay.

For the Contention-free Random Access process, since the base stationknows the terminal identifier, it may allocate a preamble for theterminal. Therefore, when the terminal intends to transmit a preamble,it does not need to randomly select a preamble, but may use theallocated preamble. After detecting the allocated preamble, the basestation may transmit a corresponding RAR, including information such astiming advance and uplink resource allocation etc. After receiving theRAR, the terminal considers that uplink synchronization has beencompleted and waits for further scheduling by the base station.Therefore, the process of initial access and the Contention-free RandomAccess only includes two steps: First Step of transmitting a preamble;and Second Step of transmitting an RAR.

In the above First Step, the base station transmits a preamble, and itstransmit power determination process includes steps as follows:

1. Setting a random process preamble powerPREAMBLE_RECEIVED_TARGET_POWER expected to be received by the basestation to be preambleInitialReceivedTargetPowerDELTA_PREAMBLE+(PREAMBLE_TRANSMISSION_COUNTER−1)*powerRampingStep, wherepreambleInitialReceivedTargetPower is an initial power configured by ahigh layer, DELTA_PREAMBLE is a preamble transmit power offset,PREAMBLE_TRANSMISSION_COUNTER is the number of random process attempts(including an initial attempt and subsequent re-attempts), andpowerRampingStep is a power ramping step configured by the high layer.

2. Determining that a final random access preamble is min{P_(CMAXc)(i),PREAMBLE_RECEIVED_TARGET_POWER+PL_(c)}, where P_(CMAXc)(i) is a maximumtransmit power of the terminal (23 dBm in LTE/LTE-A), and PL_(c) is apath loss value.

Specifically, a correspondence between the transmit power offsetPREAMBLE_RECEIVED_TARGET_POWER and a random access preamble format isshown in Table 2:

TABLE 2 Correspondence Table of Preamble Format and DELTA_PREAMBLEPreamble Format DELTA_PREAMBLE Value 0 0 dB 1 0 dB 2 −3 dB 3 −3 dB 4 8dB

The terminal obtains the DELTA_PREAMBLE value based on the preambleformat indicated by prach-ConfigIndex in the random access configurationand the correspondence in Table 2, and determines a final transmit powervalue based on this.

The future wireless communication systems may be roughly classified intotwo categories, Below 6 GHz and Above 6 GHz, according to their carrierranges. In addition, subcarrier spacings of random process channels inthe future wireless communication systems may be 1.25 kHz, 5 kHz, 15kHz, 30 kHz, 60 kHz, or 120 kHz; and a length of the preamble in therandom access process may be L=839 or L=139. In this case, the number ofthe preamble formats in the random access process of the future wirelesscommunication systems may be greater than 40. Requirements of the randomaccess process in the future wireless communication networks cannot besatisfied, if the transmit power offsets with only three differentvalues as shown in the above Table 2 are still be used. Therefore, it isrequired to design new transmit power offsets for new random accesspreamble formats designed based on new carrier ranges and subcarrierspacing sizes in the future wireless communication systems, anddetermine the random access preamble transmit power.

SUMMARY

Embodiments of the present disclosure provide a method and an apparatusfor communication based on a frame structure.

Embodiments of the present disclosure provide a communication method andan apparatus based on a frame structure, and the frame structure togreatly increase scheduling flexibility and improve spectrum utilizationwhile obtaining the advantages of the traditional time division duplexand frequency division duplex.

Embodiments of the present disclosure provide a method of determining arandom access preamble transmit power.

In one embodiment, a communication method based on a frame structure isprovided, wherein the frame structure comprises a control channel band,an anchor subband and a data transmission band, the communication methodcomprises the steps of:

detecting a synchronization signal block, performing downlinksynchronization process according to the detected synchronization signalblock, and determining time-frequency resources of the anchor subband;

acquiring random access configuration information according to thetime-frequency resources of the anchor subband, performing random accessprocess according to the random access configuration information, andcompleting uplink synchronization; and

acquiring control information in the control channel band, andperforming data communication with the base station in a datatransmission band according to the control information.

Preferably, the step of acquiring the random access configurationinformation according to the time-frequency resources of the anchorsubband comprises:

detecting a system information block on the anchor subband afterdetecting the first preset time interval of the synchronization signalblock; and

acquiring the random access configuration information carried in thedetected system information block.

Preferably, the step of acquiring the random access configurationinformation according to the time-frequency resources of the anchorsubband comprises:

determining the location of the anchor subband according to the resultof the downlink synchronization process and acquiring a masterinformation block carried by a broadcast channel in the synchronizationsignal block; and

acquiring the random access configuration information carried in themaster information block; or, determining a system information blockaccording to the master information block, and acquiring the randomaccess configuration information carried in the system informationblock.

Preferably, the step of determining the system information blockaccording to the master information block may comprise:

detecting the system information block on the anchor subband after afirst preset time interval.

Preferably, the step of determining the system information blockaccording to the master information block may comprise:

acquiring the delay or time-domain index of the system information blockindicated in the master information block;

determining the location of the time-frequency resource of the systeminformation block according to the delay or the time-domain index; and

determining the system information block in the anchor subband accordingto the location of the time-frequency resource.

Preferably, the system information block is transmitted in the anchorsubband or the data transmission band.

Preferably, the step of performing a random access process according tothe random access configuration information comprises:

transmitting a random access preamble sequence to a base station throughan uplink anchor subband, according to the random access configurationinformation;

detecting a random access response on a downlink anchor subband;

transmitting message 3 on the uplink anchor subband if the random accessresponse is detected; and

detecting a contention resolution on a downlink anchor subband.

Preferably, the step of performing a random access process according tothe random access configuration information comprises:

transmitting a random access preamble sequence to a base station throughan uplink anchor subband, according to the random access configurationinformation;

detecting the control information of the uplink anchor subband used fortransmitting the random access preamble sequence in a downlink controlchannel, and detecting and decoding random access response in a downlinkdata transmission band indicated by the control information;

transmitting message 3 in an uplink data transmission band if a randomaccess response containing a preamble sequence identifier matching withthe transmitted random access preamble sequence is detected; and

detecting a contention resolution on the downlink data transmissionband.

Preferably, the step of acquiring control information in a controlchannel band, and performing data communication with the base station ina data transmission band according to the control information comprises:

performing detection in a downlink control channel, and receivingdownlink data in the corresponding downlink data transmission bandaccording to the resource allocation indication carried in the downlinkcontrol information when detecting the downlink control informationtransmitted to itself; and

transmitting a scheduling request in an uplink control channel,performing detection in the downlink control channel after a secondpreset time interval, and allocating uplink data in the correspondinguplink data transmission band according to the up resource allocationindication carried in the downlink control information when detectingthe downlink control information transmitted to itself.

Preferably, the frame structure further comprises a guard band and/orguard time, and the method further comprises:

acquiring a configuration index of a guard band and/or guard timetransmitted by the base station, and setting according to theconfiguration index to provide protection when performing datacommunication with the base station.

In another embodiment, a communication method based on the framestructure is provided. Wherein the frame structure comprises an anchorsubband and a data transmission band, and the method comprises:

performing a random access process with a terminal according to randomaccess configuration information transmitted by the terminal through ananchor subband; and

performing data communication with the terminal in a data transmissionband.

Preferably, the step of performing a random access process with aterminal according to random access configuration informationtransmitted by the terminal through an anchor subband comprises:

receiving random access configuration information, carrying a randomaccess preamble sequence, transmitted by the terminal through an uplinkanchor subband;

performing random access according to the random access preamblesequence, and transmitting a random access response;

detecting message 3 on the uplink anchor subband; and

transmitting a contention resolution on a downlink anchor subband.

Preferably, the step of performing a random access process with aterminal according to random access configuration informationtransmitted by the terminal through an anchor subband comprises:

receiving random access configuration information, carrying a randomaccess preamble sequence, transmitted by the terminal through an uplinkanchor subband;

performing random access according to the random access preamblesequence, transmitting the control information of the uplink anchorsubband used by the random access preamble sequence in a downlinkcontrol channel, and transmitting a random access response in a downlinkdata transmission band;

detecting message 3 in an uplink data transmission band; and

transmitting a contention resolution on the downlink data transmissionband.

Preferably, the step of performing data communication with the terminalin a data transmission band comprises:

transmitting downlink control information in a downlink control channel,so that the terminal detects the downlink control information in thedownlink control channel; and

receiving a scheduling request in an uplink control channel, andtransmitting the downlink control information in the downlink controlchannel, so that the terminal detects the downlink control informationin the downlink control channel.

Preferably, the frame structure further comprises a guard band and/orguard time, and the method further comprises:

transmitting a configuration index of a guard band and guard time, sothat the terminal provides protection according to the configurationindex when performing data communication.

In yet another embodiment, a communication apparatus based on the framestructure is provided, the present disclosure comprises a framestructure comprising a control channel band, an anchor subband and adata transmission band, and the apparatus comprises:

a downlink processing unit configured to detect a synchronization signalblock, perform downlink synchronization process with a base stationaccording to the detected synchronization signal block, and determinetime-frequency resources of an anchor subband;

an uplink processing unit configured to acquire random accessconfiguration information according to the time-frequency resources ofthe anchor subband, perform a random access process according to therandom access configuration information, and complete uplinksynchronization; and

a communication unit configured to acquire control information in acontrol channel band, and perform data communication with the basestation in a data transmission band.

In yet another embodiment, a communication apparatus based on the framestructure is provided, the present disclosure comprises a framestructure comprising an anchor subband and a data transmission band, andthe apparatus comprises:

an uplink processing unit configured to perform a random access processwith a terminal according to random access configuration informationtransmitted by the terminal through an anchor subband; and

a communication unit configured to perform data communication with theterminal in a data transmission band.

In yet another embodiment, a frame structure applied to the abovecommunication method based on frame structure is provided, wherein theframe structure comprises three bands, that is, a control channel band,an anchor subband and a data transmission band;

Wherein, downlink transmission contents carrying synchronizationinformation blocks and/or uplink transmission contents carrying randomaccess configuration information are comprised in the anchor subband;

the control channel band is used for transmitting an uplink controlchannel and/or a downlink control channel; and

the data transmission band is used for transmitting uplink data and/ordownlink data.

Preferably, the frame structure further comprises a guard band and/orguard time provided between bands to separate adjacent bands so as toprovide protection during data communication.

For the future wireless communication systems, the present disclosureproposes a new method of determining a random access preamble transmitpower. For each of new random access preamble formats determined basedon new carrier ranges and subcarrier spacing sizes, new transmit poweroffsets are designed respectively. Based on this, correspondingsignaling is designed according to indications of different carrierranges and subcarrier spacing sizes to indicate the preamble transmitpower offsets. Finally, the UE determines a final random access preambletransmit power based on the transmit power offset and other relatedparameters.

In one embodiment, a method of determining a random access preambletransmit power is provided. The method includes: obtaining random accessconfiguration information from a base station, the random accessconfiguration information including a random access configuration indexand random access preamble subcarrier spacing indication information;obtaining a random access preamble format based on the random accessconfiguration index and the random access preamble subcarrier spacingindication information; and determining a random access preambletransmit power offset corresponding to the obtained random accesspreamble format.

In another embodiment, the operation of determining the random accesspreamble transmit power offset corresponding to the obtained randomaccess preamble format includes: determining the random access preambletransmit power offset corresponding to the obtained random accesspreamble format by querying a correspondence table including at leastrandom access preamble formats and random access preamble transmit poweroffsets.

In yet another embodiment, the correspondence table further includes atleast one of: random access preamble subcarrier spacing indicationinformation, and a carrier range. The operation of determining therandom access preamble transmit power offset corresponding to theobtained random access preamble format includes: determining the randomaccess preamble transmit power offset corresponding to the obtainedrandom access preamble format and at least one of the random accesspreamble subcarrier spacing indication information and the carrier rangeby querying the correspondence table.

In yet another embodiment, the correspondence table is predefined, andis stored locally at a UE.

In yet another embodiment, the correspondence table includes one ofcorrespondence tables as follows:

Random Access Preamble Format DELTA_PREAMBLE 0 0 dB 1 −3 dB 2 −6 dB 3 0dB A1 (15 kHz) 8 dB A2 (15 kHz) 5 dB A3 (15 kHz) 3 dB B1 (15 kHz) 8 dBB4 (15 kHz) 0 dB A1/B1 (15 kHz) 8 dB A2/B2 (15 kHz) 5 dB A3/B3 (15 kHz)3 dB C0 (15 kHz) 11 dB C2 (15 kHz) 5 dB A1 (30 kHz) 11 dB A2 (30 kHz) 8dB A3 (30 kHz) 6 dB B1 (30 kHz) 11 dB B4 (30 kHz) 3 dB A1/B1 (30 kHz) 11dB A2/B2 (30 kHz) 8 dB A3/B3 (30 kHz) 6 dB C0 (30 kHz) 14 dB C2 (30 kHz)8 dB A1 (60 kHz) 14 dB A2 (60 kHz) 11 dB A3 (60 kHz) 9 dB B1 (60 kHz) 14dB B4 (60 kHz) 6 dB A1/B1 (60 kHz) 14 dB A2/B2 (60 kHz) 11 dB A3/B3 (60kHz) 9 dB C0 (60 kHz) 17 dB C2 (60 kHz) 11 dB A1 (120 kHz) 17 dB A2 (120kHz) 14 dB A3 (120 kHz) 12 dB B1 (120 kHz) 17 dB B4 (120 kHz) 9 dB A1/B1(120 kHz) 17 dB A2/B2 (120 kHz) 14 dB A3/B3 (120 kHz) 12 dB C0 (120 kHz)20 dB C2 (120 kHz) 14 dB;

Random DELTA_PREAMBLE Access Carrier Range <6 GHz Carrier Range >6 GHzPreamble Msg1SCS = Msg1SCS = Msg1SCS = Msg1SCS = Format 0 1 0 1 0 0 dB 1−3 dB  2 −6 dB  3 0 dB A1 8 dB 11 dB 14 dB 17 dB A2 5 dB 8 dB 11 dB 14dB A3 3 dB 6 dB 9 dB 12 dB B1 8 dB 11 dB 14 dB 17 dB B4 0 dB 3 dB 6 dB 9 dB A1/B1 8 dB 11 dB 14 dB 17 dB A2/B2 5 dB 8 dB 11 dB 14 dB A3/B3 3dB 6 dB 9 dB 12 dB C0 11 dB  14 dB 17 dB 20 dB C2 5 dB 8 dB 11 dB  14dB;

Random DELTA_PREAMBLE Access Carrier Range <6 GHz Carrier Range >6 GHzPreamble Msg1SCS = Msg1SCS = Msg1SCS = Msg1SCS = Format 0 1 0 1 0 0 dB 1−3 dB  2 −6 dB  3 0 dB A1 11 dB 8 dB 17 dB 14 dB A2 8 dB 5 dB 14 dB 11dB A3 6 dB 3 dB 12 dB 9 dB B1 11 dB 8 dB 17 dB 14 dB B4 3 dB 0 dB  9 dB6 dB A1/B1 11 dB 8 dB 17 dB 14 dB A2/B2 8 dB 5 dB 14 dB 11 dB A3/B3 6 dB3 dB 12 dB 9 dB C0 14 dB 11 dB  20 dB 17 dB C2 8 dB 5 dB 14 dB 11 dB;

Random Access Preamble Format Msg1SCS = 0 Msg1SCS = 1 DELTA_PREAMBLE(Carrier Range <6 GHz) 0 0 dB 1 −3 dB  2 −6 dB  3 0 dB A1 8 dB 11 dB A25 dB 8 dB A3 3 dB 6 dB B1 8 dB 11 dB B4 0 dB 3 dB A1/B1 8 dB 11 dB A2/B25 dB 8 dB A3/B3 3 dB 6 dB C0 11 dB 14 dB C2 5 dB 8 dB and DELTA_PREAMBLE(Carrier Range >6 GHz) A1 14 dB 17 dB A2 11 dB 14 dB A3 9 dB 12 dB B1 14dB 17 dB B4 6 dB 9 dB A1/B1 14 dB 17 dB A2/B2 11 dB 14 dB A3/B3 9 dB 12dB C0 17 dB 20 dB C2 11 dB 14 dB; DELTA_PREAMBLE (Carrier Range<6 GHz) 00 dB 1 −3 dB  2 −6 dB  3 0 dB A1 11 dB 8 dB A2 8 dB 5 dB A3 6 dB 3 dB B111 dB 8 dB B4 3 dB 0 dB A1/B1 11 dB 8 dB A2/B2 8 dB 5 dB A3/B3 6 dB 3 dBC0 14 dB 11 dB C2 8 dB 5 dB and DELTA_PREAMBLE (Carrier Range >6 GHz) A117 dB 14 dB A2 14 dB 11 dB A3 12 dB 9 dB B1 17 dB 14 dB B4 9 dB 6 dBA1/B1 17 dB 14 dB A2/B2 14 dB 11 dB A3/B3 12 dB 9 dB C0 20 dB 17 dB C214 dB 11 dB;

Random Access Preamble Format DELTA_PREAMBLE 0 0 dB 1 −3 dB 2 −6 dB 3 0dB A1 8 + 3 · μdB A2 5 + 3 · μdB A3 3 + 3 · μdB B1 8 + 3 · μdB B4 3 ·μdB A1/B1 8 + 3 · μdB A2/B2 5 + 3 · μdB A3/B3 3 + 3 · μdB C0 11 + 3 ·μdB  C2  5 + 3 · μdB;

Random Access Preamble Format DELTA_PREAMBLE 0 0 dB 1 −3 dB 2 −6 dB 3 0dB and A1 8 + 3 · μdB A2 5 + 3 · μdB A3 3 + 3 · μdB B1 8 + 3 · μdB B4 3· μdB A1/B1 8 + 3 · μdB A2/B2 5 + 3 · μdB A3/B3 3 + 3 · μdB C0 11 + 3 ·μdB;  C2 5 + 3 · μdB

Random Access Preamble Format DELTA_PREAMBLE 0 0 dB 1 −3 dB 2 −6 dB 3 0dB A1, B1, A1/B1 8 + 3 · μdB A2, A2/B2 5 + 3 · μdB A3, A3/B3 3 + 3 · μdBB4 3 · μdB C0 11 + 3 · μdB  C2  5 + 3 · μdB;

Random Access Preamble Format DELTA_PREAMBLE 0 0 dB 1 −3 dB 2 −6 dB 3 0dB and A1, B1, A1/B1 8 + 3 · μdB A2, A2/B2 5 + 3 · μdB A3, A3/B3 3 + 3 ·μdB B4 3 · μdB C0 11 + 3 · μdB  C2 5 + 3 · μdB

wherein DELTA_PREAMBLE refers to a random access preamble transmit poweroffset, Msg1SCS refers to random access preamble subcarrier spacingindication information, 0, 1, 2, 3, A1, A2, A3, B1, B4, A1/B1, A2/B2,A3/B3, C0, C2 refer to defined random access preamble formats, 15 kHz,30 kHz, 60 kHz, 120 kHz are random access preamble subcarrier spacing, μis a parameter indicating a random access preamble subcarrier spacing,wherein the random access preamble subcarrier spacing is 15 kHz whenμ=0; the random access preamble subcarrier spacing is 30 kHz when μ=1;the random access preamble subcarrier spacing is 60 kHz when μ=2; andthe random access preamble subcarrier spacing is 120 kHz when μ=3.

In yet another embodiment, a method of determining a random accesspreamble transmit power is provided. The method includes: generatingrandom access configuration information, the random access configurationinformation including a random access configuration index and randomaccess preamble subcarrier spacing indication information; andtransmitting the random access configuration information to a UE.

In yet another embodiment, the random access configuration index and therandom access preamble subcarrier spacing indication information areused by the UE to obtain a random access preamble format, and todetermine a random access preamble transmit power offset correspondingto the obtained random access preamble format.

In yet another embodiment, a UE is provided. The UE includes: acommunication interface, configured for communication; a processor; anda memory storing computer-executable instructions which, when executedby the processor, cause the processor to: obtain random accessconfiguration information from a base station, the random accessconfiguration information including a random access configuration indexand random access preamble subcarrier spacing indication information;obtain a random access preamble format based on the random accessconfiguration index and the random access preamble subcarrier spacingindication information; and determine a random access preamble transmitpower offset corresponding to the obtained random access preambleformat.

In yet another embodiment, the operation of determining the randomaccess preamble transmit power offset corresponding to the obtainedrandom access preamble format includes: determining a random accesspreamble transmit power offset corresponding to the obtained randomaccess preamble format by querying a correspondence table including atleast random access preamble formats and random access preamble transmitpower offsets.

In yet another embodiment, the correspondence table further includes atleast one of: random access preamble subcarrier spacing indicationinformation, and a carrier range. The operation of determining therandom access preamble transmit power offset corresponding to theobtained random access preamble format includes: determining the randomaccess preamble transmit power offset corresponding to the obtainedrandom access preamble format and at least one of the random accesspreamble subcarrier spacing indication information and the carrier rangeby querying the correspondence table.

In yet another embodiment, the correspondence table is predefined, andis stored locally at the UE.

In yet another embodiment, a base station is provided. The base stationincludes: a communication interface, configured for communication; aprocessor; and a memory storing computer-executable instructions which,when executed by the processor, cause the processor to: generate randomaccess configuration information, the random access configurationinformation including a random access configuration index and randomaccess preamble subcarrier spacing indication information; and transmitthe random access configuration information to a UE.

In yet another embodiment, the random access configuration index and therandom access preamble subcarrier spacing indication information areused by the UE to obtain a random access preamble format, and todetermine a random access preamble transmit power offset correspondingto the obtained random access preamble format.

In yet another embodiment, a computer-readable medium is provided. Thecomputer-readable medium has stored thereon instructions which, whenexecuted by a processor, cause the processor to perform the method asdescribed above.

Advantageous Effects of Invention

A method and an apparatus according to various embodiments of thepresent disclosure describe that greatly increasing schedulingflexibility and improving spectrum utilization are achieved meanwhilethe advantages of the traditional time division duplex and frequencydivision duplex are obtained.

A method and an apparatus according to various embodiments of thepresent disclosures describe that determining a random access preambletransmit power proposed in the present disclosure is applicable to allof preamble formats in the future wireless communication systems, andmay efficiently adjust the preamble transmit power in the random accessprocess, and improve the success probability of the UE's random accessin a case of controlling interference, significantly improve theperformance of the future wireless communication systems, and providethe UE with a lower access delay and a better access experience.

BRIEF DESCRIPTION OF THE DRAWINGS

For a more complete understanding of this disclosure and its advantages,reference is now made to the following description, taken in conjunctionwith the accompanying drawings, in which:

FIG. 1 illustrates a wireless communication system according to variousembodiments of the present disclosure;

FIG. 2 illustrates the BS in the wireless communication system accordingto various embodiments of the present disclosure;

FIG. 3 illustrates the terminal in the wireless communication systemaccording to various embodiments of the present disclosure;

FIG. 4 illustrates the communication interface in the wirelesscommunication system according to various embodiments of the presentdisclosure;

FIG. 5 illustrates a schematic diagram of an FDD frame structure in theprior art;

FIG. 6 illustrates a schematic diagram of an TDD frame structure in theprior art;

FIG. 7 illustrates a frame structure according to various embodiments ofthe present disclosure;

FIG. 8 illustrates a flowchart of a communication method based on aframe structure at a terminal side according to various embodiments ofthe present disclosure;

FIG. 9 illustrates a flowchart of a communication method based on aframe structure at a base station side according to various embodimentsof the present disclosure;

FIG. 10 illustrates a schematic diagram of a channel structure adoptedin the first embodiment of the present disclosure;

FIG. 11A illustrates a schematic diagram of a transmission mode of asystem information block according to various embodiments of the presentdisclosure;

FIG. 11B illustrates a schematic diagram of another transmission mode ofa system information block according to various embodiments of thepresent disclosure;

FIG. 12 illustrates a schematic diagram of a control channel accordingto various embodiments of the present disclosure;

FIG. 13 illustrates a schematic diagram of an anchor subband structureaccording to various embodiments of the present disclosure;

FIG. 14 illustrates a schematic flowchart of uplink data communicationaccording to various embodiments of the present disclosure;

FIG. 15 illustrates a schematic diagram of timing division in uplink anddownlink data transmission according to various embodiments of thepresent disclosure;

FIG. 16 illustrates a schematic diagram of a channel structure accordingto Embodiment 3 of the present disclosure;

FIG. 17 illustrates a schematic diagram of another channel structureaccording to Embodiment 3 of the present disclosure;

FIG. 18 illustrates a schematic diagram of a structure of acommunication apparatus based on frame structure at a terminal sideaccording to various embodiments of the present disclosure;

FIG. 19 illustrates a schematic diagram of a structure of acommunication apparatus based on frame structure at a base station sideaccording to various embodiments of the present disclosure.

FIG. 20 schematically illustrates an exemplary wireless communicationsystem according to various embodiments of the present disclosure;

FIG. 21 schematically illustrates a flowchart of a method of determininga random access preamble transmit power performed at a base stationaccording to various embodiments of the present disclosure;

FIG. 22 schematically illustrates a structural schematic diagram of abase station according to various embodiments of the present disclosure;

FIG. 23 schematically illustrates a flowchart of a method of determininga random access preamble transmit power performed at a UE according tovarious embodiments of the present disclosure; and

FIG. 24 schematically illustrates a structural schematic diagram of a UEaccording to various embodiments of the present disclosure.

DETAILED DESCRIPTION

The present disclosure provides a communication method and acommunication apparatus based on a frame structure, and the framestructure. The specific embodiments of the present disclosure will bedescribed in detail below with reference to the accompanying drawings.

Embodiments of the present disclosure will be described in detailhereinafter. The examples of these embodiments have been illustrated inthe accompanying drawings throughout which same or similar referencenumerals refer to same or similar elements or elements having same orsimilar functions. The embodiments described with reference to theaccompanying drawings are illustrative, merely used for explaining thepresent disclosure and should not be regarded as any limitationsthereto.

It can be understood by those skilled in the art, the singular forms“a”, “an”, “said” and “the” are intended to comprise the plural forms aswell, unless expressly stated otherwise. It will be further understoodthat the term “comprising” when used in this specification, specify thepresence of stated features, integers, steps, operations, elements,and/or components, but do not preclude the presence or addition of oneor more other features, integers, steps, operations, elements,components, and/or groups thereof. It will be understood that when anelement is referred to as being “connected” or “coupled” to anotherelement, it can be directly connected or coupled to the other element orintervening elements may be present. Furthermore, “connected” or“coupled” as used herein may comprise wirelessly connected or coupled.As used herein, the term “and/or” comprises any and all combinations ofone or more of the associated listed items.

It should be understood by one person of ordinary skill in the art that,unless otherwise defined, all terms (including technical and scientificterms) used herein have the same meaning as commonly understood by oneperson of ordinary skill in the art to which the present disclosurebelongs. It should be further understood that terms, such as thosedefined in commonly used dictionaries, should be interpreted as having ameaning that is consistent with their meanings in the context of theprior art and will not be interpreted in an idealized or overly formalsense unless expressly so defined herein.

The skilled in the art may understand that the “terminal” and “terminaldevice” used herein include not only a wireless signal receiver device,which is a device only having a wireless signal receiver without atransmitting capability, but also a device with receiving andtransmitting hardware, which is a device having receiving andtransmitting hardware capable of performing a bidirectionalcommunication over a bidirectional communication link. Such a device mayinclude: a cellular or other communication device having a single linedisplay or a multi-line display or a cellular or other communicationdevice without a multi-line display; a Personal Communication Service(PCS), which may combine voice, data processing, fax and/or datacommunication capabilities; a Personal Digital Assistant (PDA), whichmay include a Radio Frequency (RF) receiver, a pager, Internet/Intranetaccess, a web browser, a notepad, a calendar, and/or a GlobalPositioning System (GPS) receiver; a conventional laptop and/or palmtopcomputer or other device, which may be a conventional laptop and/orpalmtop computer or other device having and/or including an RF receiver.The “terminal”, “terminal device” as used herein may be portable,transportable, installed in a vehicle (of aviation, maritime, and/orland), or may be adapted and/or configured to operate locally, and/ormay operate in a distributed form on the earth and/or at any otherlocations in space. The “terminal” and “terminal device” used herein mayalso be a communication terminal, an Internet terminal, a music/videoplaying terminal, such as a PDA, a Mobile Internet Device (MID), and/ora mobile phone having a music/video playback function, or a smart TV, aset-top box and other devices. In addition, “terminal” and “terminaldevice” may also be replaced with “user” and “UE”.

Hereinafter, in various embodiments of the present disclosure, hardwareapproaches will be described as an example. However, various embodimentsof the present disclosure include a technology that uses both hardwareand software and thus, the various embodiments of the present disclosuremay not exclude the perspective of software.

Hereinafter, the present disclosure describes technology forcommunication based on a frame structure in a wireless communicationsystem, and determining random access preamble transmit power, a userequipment (UE), a base station and a computer readable medium relatedthereto.

The terms referring to synchronization signal block, the terms referringto random access configuration information, the terms referring torandom access process, the terms referring to control information, theterms referring to a signal, the terms referring to a channel, the termsreferring to control information, the terms referring to a networkentity, and the terms referring to elements of a device used in thefollowing description are used only for convenience of the description.Accordingly, the present disclosure is not limited to the followingterms, and other terms having the same technical meaning may be used.

Further, although the present disclosure describes various embodimentsbased on the terms used in some communication standards (for example,3rd Generation Partnership Project (3GPP)), they are only examples forthe description. Various embodiments of the present disclosure may beeasily modified and applied to other communication systems.

FIG. 1 illustrates a wireless communication system according to variousembodiments of the present disclosure. In FIG. 1, a base station (BS)110, a terminal 120, and a terminal 130 are illustrated as the part ofnodes using a wireless channel in a wireless communication system. FIG.1 illustrates only one BS, but another BS, which is the same as orsimilar to the BS 110, may be further included.

The BS 110 is network infrastructure that provides wireless access tothe terminals 120 and 130. The BS 110 has coverage defined as apredetermined geographical region based on the distance at which asignal can be transmitted. The BS 110 may be referred to as “accesspoint (AP),” “eNodeB (eNB),” “5th generation (5G) node,” “wirelesspoint,” “transmission/reception Point (TRP)” as well as “base station.”

Each of the terminals 120 and 130 is a device used by a user, andperforms communication with the BS 110 through a wireless channel.Depending on the case, at least one of the terminals 120 and 130 mayoperate without user involvement. That is, at least one of the terminals120 and 130 is a device that performs machine-type communication (MTC)and may not be carried by the user. Each of the terminals 120 and 130may be referred to as “user equipment (UE),” “mobile station,”“subscriber station,” “remote terminal,” “wireless terminal,” or “userdevice” as well as “terminal.”

The BS 110, the terminal 120, and the terminal 130 may transmit andreceive wireless signals in millimeter wave (mmWave) bands (for example,28 GHz, 30 GHz, 38 GHz, and 60 GHz). At this time, in order to improve achannel gain, the BS 110, the terminal 120, and the terminal 130 mayperform beamforming. The beamforming may include transmissionbeamforming and reception beamforming. That is, the BS 110, the terminal120, and the terminal 130 may assign directivity to a transmissionsignal and a reception signal. To this end, the BS 110 and the terminals120 and 130 may select serving beams 112, 113, 121, and 131 through abeam search procedure or a beam management procedure. After that,communications may be performed using resources having a quasico-located relationship with resources carrying the serving beams 112,113, 121, and 131.

A first antenna port and a second antenna ports are considered to bequasi co-located if the large-scale properties of the channel over whicha symbol on the first antenna port is conveyed can be inferred from thechannel over which a symbol on the second antenna port is conveyed. Thelarge-scale properties may include one or more of delay spread, dopplerspread, doppler shift, average gain, average delay, and spatial Rxparameters.

FIG. 2 illustrates the BS in the wireless communication system accordingto various embodiments of the present disclosure. A structureexemplified at FIG. 2 may be understood as a structure of the BS 110.The term “-module”, “-unit” or “-er” used hereinafter may refer to theunit for processing at least one function or operation and may beimplemented in hardware, software, or a combination of hardware andsoftware.

Referring to FIG. 2, the BS may include a wireless communicationinterface 210, a backhaul communication interface 220, a storage unit230, and a controller 240.

The wireless communication interface 210 performs functions fortransmitting and receiving signals through a wireless channel. Forexample, the wireless communication interface 210 may perform a functionof conversion between a baseband signal and bitstreams according to aphysical layer standard of the system. For example, in datatransmission, the wireless communication interface 210 generates complexsymbols by encoding and modulating transmission bitstreams. Further, indata reception, the wireless communication interface 210 reconstructsreception bitstreams by demodulating and decoding the baseband signal.

In addition, the wireless communication interface 210 up-converts thebaseband signal into an Radio Frequency (RF) band signal, transmits theconverted signal through an antenna, and then down-converts the RF bandsignal received through the antenna into the baseband signal. To thisend, the wireless communication interface 210 may include a transmissionfilter, a reception filter, an amplifier, a mixer, an oscillator, adigital-to-analog convertor (DAC), an analog-to-digital convertor (ADC),and the like. Further, the wireless communication interface 210 mayinclude a plurality of transmission/reception paths. In addition, thewireless communication interface 210 may include at least one antennaarray consisting of a plurality of antenna elements.

On the hardware side, the wireless communication interface 210 mayinclude a digital unit and an analog unit, and the analog unit mayinclude a plurality of sub-units according to operation power, operationfrequency, and the like. The digital unit may be implemented as at leastone processor (e.g., a digital signal processor (DSP)).

The wireless communication interface 210 transmits and receives thesignal as described above. Accordingly, the wireless communicationinterface 210 may be referred to as a “transmitter” a “receiver,” or a“transceiver.” Further, in the following description, transmission andreception performed through the wireless channel may be used to have ameaning including the processing performed by the wireless communicationinterface 210 as described above.

The backhaul communication interface 220 provides an interface forperforming communication with other nodes within the network. That is,the backhaul communication interface 220 converts bitstreams transmittedto another node, for example, another access node, another BS, a highernode, or a core network, from the BS into a physical signal and convertsthe physical signal received from the other node into the bitstreams.

The storage unit 230 stores a basic program, an application, and datasuch as setting information for the operation of the BS 110. The storageunit 230 may include a volatile memory, a non-volatile memory, or acombination of volatile memory and non-volatile memory. Further, thestorage unit 230 provides stored data in response to a request from thecontroller 240.

The controller 240 controls the general operation of the BS. Forexample, the controller 240 transmits and receives a signal through thewireless communication interface 210 or the backhaul communicationinterface 220. Further, the controller 240 records data in the storageunit 230 and reads the recorded data. The controller 240 may performsfunctions of a protocol stack that is required from a communicationstandard. According to another implementation, the protocol stack may beincluded in the wireless communication interface 210. To this end, thecontroller 240 may include at least one processor. According to variousembodiments, the controller 240 may include a command/code temporarilyresided in the controller 240, a storage space that stores thecommand/code, or a part of circuitry of the controller 240.

According to exemplary embodiments of the present disclosure, thecontroller 240 may detect a synchronization signal block, performdownlink synchronization process according to the detectedsynchronization signal block, and determine time-frequency resources ofan anchor subband, acquire random access configuration informationaccording to the time-frequency resources of the anchor subband, performa random access process according to the random access configurationinformation, and complete uplink synchronization, and acquire controlinformation in a control channel band, and performing data communicationwith a base station in the data transmission band according to thecontrol information. For example, the controller 240 may control thebase station to perform operations according to the exemplaryembodiments of the present disclosure.

FIG. 3 illustrates the terminal in the wireless communication systemaccording to various embodiments of the present disclosure. A structureexemplified at FIG. 3 may be understood as a structure of the terminal120 or the terminal 130. The term “-module”, “-unit” or “-er” usedhereinafter may refer to the unit for processing at least one functionor operation, and may be implemented in hardware, software, or acombination of hardware and software.

Referring to FIG. 3, the terminal 120 includes a communication interface310, a storage unit 320, and a controller 330.

The communication interface 310 performs functions fortransmitting/receiving a signal through a wireless channel. For example,the communication interface 310 performs a function of conversionbetween a baseband signal and bitstreams according to the physical layerstandard of the system. For example, in data transmission, thecommunication interface 310 generates complex symbols by encoding andmodulating transmission bitstreams. Also, in data reception, thecommunication interface 310 reconstructs reception bitstreams bydemodulating and decoding the baseband signal. In addition, thecommunication interface 310 up-converts the baseband signal into an RFband signal, transmits the converted signal through an antenna, and thendown-converts the RF band signal received through the antenna into thebaseband signal. For example, the communication interface 310 mayinclude a transmission filter, a reception filter, an amplifier, amixer, an oscillator, a DAC, and an ADC.

Further, the communication interface 310 may include a plurality oftransmission/reception paths. In addition, the communication interface310 may include at least one antenna array consisting of a plurality ofantenna elements. In the hardware side, the wireless communicationinterface 210 may include a digital circuit and an analog circuit (forexample, a radio frequency integrated circuit (RFIC)). The digitalcircuit and the analog circuit may be implemented as one package. Thedigital circuit may be implemented as at least one processor (e.g., aDSP). The communication interface 310 may include a plurality of RFchains. The communication interface 310 may perform beamforming.

The communication interface 310 transmits and receives the signal asdescribed above. Accordingly, the communication interface 310 may bereferred to as a “transmitter,” a “receiver,” or a “transceiver.”Further, in the following description, transmission and receptionperformed through the wireless channel is used to have a meaningincluding the processing performed by the communication interface 310 asdescribed above.

The storage unit 320 stores a basic program, an application, and datasuch as setting information for the operation of the terminal 120. Thestorage unit 320 may include a volatile memory, a non-volatile memory,or a combination of volatile memory and non-volatile memory. Further,the storage unit 320 provides stored data in response to a request fromthe controller 330.

The controller 330 controls the general operation of the terminal 120.For example, the controller 330 transmits and receives a signal throughthe communication interface 310. Further, the controller 330 recordsdata in the storage unit 320 and reads the recorded data. The controller330 may performs functions of a protocol stack that is required from acommunication standard. According to another implementation, theprotocol stack may be included in the communication interface 310. Tothis end, the controller 330 may include at least one processor ormicroprocessor, or may play the part of the processor. Further, the partof the communication interface 310 or the controller 330 may be referredto as a communication processor (CP). According to various embodiments,the controller 330 may include a command/code temporarily resided in thecontroller 330, a storage space that stores the command/code, or a partof circuitry of the controller 330.

According to exemplary embodiments of the present disclosure, thecontroller 330 may detect a synchronization signal block, performdownlink synchronization process according to the detectedsynchronization signal block, and determine time-frequency resources ofan anchor subband, acquire random access configuration informationaccording to the time-frequency resources of the anchor subband, performa random access process according to the random access configurationinformation, and complete uplink synchronization, and acquire controlinformation in a control channel band, and performing data communicationwith a base station in the data transmission band according to thecontrol information. For example, the controller 330 may control theterminal to perform operations according to the exemplary embodiments ofthe present disclosure.

FIG. 4 illustrates the communication interface in the wirelesscommunication system according to various embodiments of the presentdisclosure. FIG. 4 shows an example for the detailed configuration ofthe communication interface 210 of FIG. 2 or the communication interface310 of FIG. 3. More specifically, FIG. 4 shows elements for performingbeamforming as part of the communication interface 210 of FIG. 2 or thecommunication interface 310 of FIG. 3.

Referring to FIG. 4, the communication interface 210 or 310 includes anencoding and circuitry 402, a digital circuitry 404, a plurality oftransmission paths 406-1 to 406-N, and an analog circuitry 408.

The encoding and circuitry 402 performs channel encoding. For thechannel encoding, at least one of a low-density parity check (LDPC)code, a convolution code, and a polar code may be used. The encoding andcircuitry 402 generates modulation symbols by performing constellationmapping.

The digital circuitry 404 performs beamforming for a digital signal (forexample, modulation symbols). To this end, the digital circuitry 404multiples the modulation symbols by beamforming weighted values. Thebeamforming weighted values may be used for changing the size and phraseof the signal, and may be referred to as a “precoding matrix” or a“precoder.” The digital circuitry 404 outputs the digitally beamformedmodulation symbols to the plurality of transmission paths 406-1 to406-N. At this time, according to a multiple input multiple output(MIMO) transmission scheme, the modulation symbols may be multiplexed,or the same modulation symbols may be provided to the plurality oftransmission paths 406-1 to 406-N.

The plurality of transmission paths 406-1 to 406-N convert the digitallybeamformed digital signals into analog signals. To this end, each of theplurality of transmission paths 406-1 to 406-N may include an inversefast Fourier transform (IFFT) calculation unit, a cyclic prefix (CP)insertion unit, a DAC, and an up-conversion unit. The CP insertion unitis for an orthogonal frequency division multiplexing (OFDM) scheme, andmay be omitted when another physical layer scheme (for example, a filterbank multi-carrier: FBMC) is applied. That is, the plurality oftransmission paths 406-1 to 406-N provide independent signal processingprocesses for a plurality of streams generated through the digitalbeamforming. However, depending on the implementation, some of theelements of the plurality of transmission paths 406-1 to 406-N may beused in common.

The analog circuitry 408 performs beamforming for analog signals. Tothis end, the digital circuitry 404 multiples the analog signals bybeamforming weighted values. The beamformed weighted values are used forchanging the size and phrase of the signal. More specifically, accordingto a connection structure between the plurality of transmission paths406-1 to 406-N and antennas, the analog circuitry 408 may be configuredin various ways. For example, each of the plurality of transmissionpaths 406-1 to 406-N may be connected to one antenna array. In anotherexample, the plurality of transmission paths 406-1 to 406-N may beconnected to one antenna array. In still another example, the pluralityof transmission paths 406-1 to 406-N may be adaptively connected to oneantenna array, or may be connected to two or more antenna arrays.

Methods according to embodiments stated in claims and/or specificationsof the present disclosure may be implemented in hardware, software, or acombination of hardware and software.

When the methods are implemented by software, a computer-readablestorage medium for storing one or more programs (software modules) maybe provided. The one or more programs stored in the computer-readablestorage medium may be configured for execution by one or more processorswithin the electronic device. The at least one program may includeinstructions that cause the electronic device to perform the methodsaccording to various embodiments of the present disclosure as defined bythe appended claims and/or disclosed herein.

The programs (software modules or software) may be stored innon-volatile memories including a random access memory and a flashmemory, a read only memory (ROM), an electrically erasable programmableread only memory (EEPROM), a magnetic disc storage device, a compactdisc-ROM (CD-ROM), digital versatile discs (DVDs), or other type opticalstorage devices, or a magnetic cassette. Alternatively, any combinationof some or all of the may form a memory in which the program is stored.Further, a plurality of such memories may be included in the electronicdevice.

In addition, the programs may be stored in an attachable storage devicewhich is accessible through communication networks such as the Internet,Intranet, local area network (LAN), wide area network (WAN), and storagearea network (SAN), or a combination thereof. Such a storage device mayaccess the electronic device via an external port. Further, a separatestorage device on the communication network may access a portableelectronic device.

In the above-described detailed embodiments of the present disclosure, acomponent included in the present disclosure is expressed in thesingular or the plural according to a presented detailed embodiment.However, the singular form or plural form is selected for convenience ofdescription suitable for the presented situation, and variousembodiments of the present disclosure are not limited to a singleelement or multiple elements thereof. Further, either multiple elementsexpressed in the description may be configured into a single element ora single element in the description may be configured into multipleelements.

While the present disclosure has been shown and described with referenceto certain embodiments thereof, it will be understood by those skilledin the art that various changes in form and details may be made thereinwithout departing from the scope of the present disclosure. Therefore,the scope of the present disclosure should not be defined as beinglimited to the embodiments, but should be defined by the appended claimsand equivalents thereof.

Although the present disclosure has been described with an exemplaryembodiment, various changes and modifications may be suggested to oneskilled in the art. It is intended that the present disclosure encompasssuch changes and modifications as fall within the scope of the appendedclaims.

In the present disclosure, a communication method based on a framestructure is provided, which comprises the following steps:

Step 1: downlink synchronization: a terminal completes downlinksynchronization through a downlink synchronization process, and reads adownlink transmission part of an anchor subband to obtain a systembandwidth and a bandwidth structure, so as to determine information suchas the location and time structure of the anchor subband, the locationof an uplink control channel and a downlink control channel, andbandwidth of a guard band.

Step 2: uplink random access: the terminal transmits a preamble sequencethrough the uplink transmission part in the anchor subband to completethe random access process.

Step 3: after completing the access process, the terminal communicateswith the base station in a corresponding band.

In the above communication method, the frame structure as shown in FIG.7 is adopted, which consists of four parts of frequency bands: a controlchannel band close to the band edge, an anchor subband at the center ofthe band, a data transmission band and a guard band.

Wherein, the transmission content in the anchor subband at the center ofthe band is fixed. The transmission content comprises downlinktransmission content necessary for an access system such as a downlinksynchronization signal, downlink broadcast channel, and uplinktransmission content necessary for a access system such as a randomaccess channel.

The control channel band transmits the uplink control channel and thedownlink control channel in a frequency-division mode or a time-divisionmode.

The data transmission band transmits uplink/downlink data in afrequency-division mode, a time-division mode or a Multi-carrierDivision Duplexing (MDD) mode.

At the same time, a guard band and/or guard time are inserted betweenadjacent bands to ensure low interference between adjacent bands and toensure the reliability of data transmission on the control channel andthe anchor subband.

Based on the foregoing communication method and the frame structure inFIG. 7, the communication method based on frame structure provided inthe present disclosure is mainly described based on the terminal sideand the base station side, respectively.

As shown in FIG. 8, a communication method based on frame structureprovided by the present disclosure comprises the following steps:

Step 801: detecting a synchronization signal block, performing downlinksynchronization processing with a base station according to the detectedsynchronization signal block, and determining time-frequency resourcesof an anchor subband.

Step 802: acquiring random access configuration information according tothe time-frequency resources of the anchor subband, performing a randomaccess process according to the random access configuration information,and completing uplink synchronization.

In this step, the step of acquiring random access configurationinformation according to the time-frequency resources of the anchorsubband comprises:

detecting a system information block on the anchor subband afterdetecting the first preset time interval of the synchronization signalblock; and

acquiring the random access configuration information carried in thedetected system information block.

Or, the step of acquiring random access configuration informationaccording to the time-frequency resources of the anchor subband mayfurther comprises:

determining the location of the anchor subband according to the resultof the downlink synchronous processing, and acquiring a masterinformation block carried by a broadcast channel in the synchronizationsignal block; and

acquiring the random access configuration information carried in themaster information block.

Or, the step of acquiring random access configuration informationaccording to the time-frequency resources of the anchor subband mayfurther comprises:

determining the location of the anchor subband according to the resultof the downlink synchronous processing, and acquiring a masterinformation block carried by a broadcast channel in the synchronizationsignal block; and

determining a system information block according to the masterinformation block, and acquiring random access configuration informationcarried in the system information block.

In the above step, the step of determining a system information blockaccording to the master information block may comprise:

acquiring the time-domain index of the system information blockindicated in the master information block;

determining the location of the time-frequency resource of the systeminformation block according to the time-domain index; and

determining the system information block in the anchor subband accordingto the location of the time-frequency resource.

Wherein, the system information block is transmitted in the anchorsubband or data transmission band. In this step, the step of performinga random access process according to the random access configurationinformation comprises:

transmitting a random access preamble sequence to a base station throughan uplink anchor subband, according to the random access configurationinformation;

transmitting message 3 on the uplink anchor subband if detecting therandom access response; and

detecting a contention resolution on a downlink anchor subband.

Or, the step of performing a random access process according to therandom access configuration information comprises:

transmitting a random access preamble sequence to a base station throughan uplink anchor subband, according to the random access configurationinformation;

detecting the control information of the uplink anchor subband used fortransmitting the random access preamble sequence in a downlink controlchannel, and detecting and decoding random access response in a downlinkdata transmission band indicated by the control information;

transmitting message 3 in an uplink data transmission band if a randomaccess response containing a preamble sequence identifier matching withthe transmitted random access preamble sequence is detected; and

detecting a contention resolution on the downlink data transmissionband.

Step 803: acquiring control information in a control channel band, andperforming data communication with the base station in a datatransmission frequency band.

In this step, the step of acquiring control information in a controlchannel band, and performing data communication with the base station ina data transmission frequency band according to the control informationcomprises two parts, i.e., uplink data communication and downlink datacommunication;

wherein, detecting in a downlink control channel, and receiving downlinkdata in the corresponding downlink data transmission band according tothe resource allocation indication carried in the downlink controlinformation when detecting the downlink control information transmittedto itself; and

transmitting a scheduling request in an uplink control channel,detecting in the downlink control channel after a second preset timeinterval, and allocating uplink data in the corresponding uplink datatransmission band according to the uplink resource allocation indicationcarried in the downlink control information when detecting the downlinkcontrol information transmitted to itself.

Wherein, the method further comprises:

acquiring a configuration index of a guard band and/or guard timetransmitted by the base station, and setting according to theconfiguration index to provide protection when performing datacommunication with the base station.

The present disclosure further provides a communication method based onthe frame structure. As shown in FIG. 9, the method comprises:

Step 901: performing a random access process with a terminal accordingto random access configuration information transmitted by the terminalthrough an anchor subband.

Wherein, the step of performing a random access process with a terminalaccording to random access configuration information transmitted by theterminal through an anchor subband comprises:

receiving random access configuration information, carrying a randomaccess preamble sequence, transmitted by the terminal through an uplinkanchor subband;

performing random access process according to the random access preamblesequence, and transmitting a random access response;

detecting message 3 on the uplink anchor subband; and

transmitting a contention resolution on a downlink anchor subband.

Or, the step of performing a random access process with a terminalaccording to random access configuration information transmitted by theterminal through an anchor subband comprises:

receiving random access configuration information, carrying a randomaccess preamble sequence, transmitted by the terminal through an uplinkanchor subband;

performing random access process according to the random access preamblesequence, transmitting the control information of the uplink anchorsubband used by the random access preamble sequence in a downlinkcontrol channel, and transmitting a random access response in a downlinkdata transmission band;

detecting message 3 in an uplink data transmission band; and

transmitting a contention resolution on the downlink data transmissionband.

Step 902: performing data communication with the terminal in a datatransmission band.

In this step, the step of performing data communication with theterminal in a data transmission band comprises two parts, i.e., uplinkdata communication and downlink data communication; wherein,

transmitting downlink control information in a downlink control channel,so that the terminal detects the downlink control information in thedownlink control channel;

receiving a scheduling request in an uplink control channel, andtransmitting the downlink control information in the downlink controlchannel, so that the terminal detects the downlink control informationin the downlink control channel.

Wherein, the method further comprises:

transmitting a configuration index of a guard band and/or guard time, sothat the terminal provides protection according to the configurationindex when performing data communication.

The present disclosure further provides a frame structure applied in theabove-mentioned communication method based on the frame structure, wherethe frame structure comprises three bands, i.e., a control channel band,an anchor subband and a data transmission band;

Wherein, downlink transmission contents carrying synchronizationinformation blocks and/or uplink transmission contents carrying randomaccess configuration information are comprised in the anchor subband;

the control channel band is used for transmitting an uplink controlchannel and/or a downlink control channel; and

the data transmission band is used for transmitting uplink data and/ordownlink data.

Preferably, the frame structure further comprises a guard band and/orguard time provided between bands to separate adjacent bands so as toprovide protection during data communication.

With respect to the communication method based on the frame structureprovided by the present disclosure, the communication method isspecifically described in the following three specific embodiments.

Embodiment 1

In this embodiment, a communication method based on the frame structureis introduced in combination with a specific system. The channel framestructure adopted in this embodiment is as shown in FIG. 10, which is acomposition of one radio frame. In this embodiment, one radio frameconsists of a plurality of subframes, each subframe consists of aplurality of symbols, one symbol comprises a plurality of subcarriers,and the subcarriers are divided into different subbands according tofunctions. In FIG. 10, these subbands are divided according to functionsinto: control channel 1 and control channel 2 located at a band edge,which respectively represents an uplink control channel and a downlinkcontrol channel, or a downlink control channel and an uplink controlchannel; an anchor subband located at the center of the band, which isused for transmitting uplink and downlink data necessary for accessingthe system; a data channel located between a control channel and theanchor subband, which is used for transmitting uplink data and downlinkdata; and a guard band located between the subbands.

Wherein, the anchor subband performs switch between a downlink channeland an uplink channel in unit of a subframe or a subframe group composedof a plurality of subframes. The downlink channel in the anchor subbandis used for transmitting a broadcast channel, a synchronization signaland so on, for example, which comprises a Primary Synchronization Signal(PSS), a secondary synchronization signal (SSS), and a synchronizationsignal block composed of broadcast channels. The uplink channel in theanchor subband is used for transmitting a random access channel and thelike. One possible way is that the anchor subbands of some fixedsubframes are dedicated for transmitting a downlink synchronizationsignal block. Taking a radio frame containing 7 subframes (each subframeis named as subframe 0 to subframe 6 respectively) as an example,subframe 0 is fixed for transmitting a downlink anchor subband, orsubframes 0 and 4 are fixed for transmitting a downlink anchor subband,and anchor subbands of the other subframes are determined according toconfiguration. A simple example is that the transmission directions ofthe other subframes are informed in a broadcast channel.

The control channel is located at the band edge, one side is thedownlink control channel, and the other side is the uplink controlchannel. Using frequency hopping, the downlink/uplink control channelalternately appears at the band edge. For example, the downlink controlchannel of the even index of subframes is at the upper edge of the bandand the uplink control channel is at the lower edge of the band; whilethe downlink control channel of the odd index of the subframes is at thelower edge of the band and the uplink control channel is at the upperedge of the band. The frequency hopping mode, that is, the locationwhere the uplink/downlink control channel is located is configured byhigher layer signaling or is notified by the downlink control channel.

The data channel is located between the anchor subband and the controlchannel, and uplink data transmission and downlink data transmission aredistinguished by adopting time-division or subband frequency-divisionfor dividing uplink and downlink, or adopting division of a subcarrierlevel.

A guard band is added between different channels to prevent inter-bandinterference or uplink-downlink crosstalk. During switch between uplinkand downlink in the same subband, guard time is added for protecting theswitch between uplink and downlink.

Processes of terminal for accessing network and data communication are:

1. The terminal performs downlink synchronization. That is, the terminaldetects the synchronization signal block by blind detection. Afterdetecting the synchronization signal block, the terminal can completethe time and frequency domain synchronization to determine the locationof the anchor subband. The terminal reads the master information blockfrom the broadcast channel. The information read from the masterinformation block should comprise the system bandwidth and the locationof the time-frequency resources of the system information block. Theterminal reads other information necessary for access from the systeminformation block indicated by the master information block, includingthe transmission time location of the uplink part on the anchor subband,the random access channel configuration information, the configurationinformation of the random access preamble resource pool, and bandwidthof each subband, i.e., time-frequency resource location.

It should be noted that the foregoing system information block indicatedby the master information block may be located on the downlink anchorsubband, for example, time delayed by a fixed time sequence than thesynchronization signal block. In this case, the master information blockdoes not need to indicate the time-frequency location of the systeminformation block, and after detecting the synchronization signal block,the terminal detects the system information block on the downlink anchorsubband after a fixed or preset time; Or, the master information blockonly informs the delay of the system information block with respect tothe synchronization signal block or time-domain index, and the terminaldetermines the location of the system information block according to thedelay or time domain index.

In another way, the system information block indicated by the masterinformation block is located on the data channel, and the masterinformation block needs to indicate the time-frequency resource locationof the system information block. After reading the master informationblock, the terminal reads the time-frequency resource location of thesystem information block and reads the system information block at thetime-frequency resource location. The above two ways are shown in FIG.11A and FIG. 11B.

The terminal determines a location of each sub-band, a bandwidth and abandwidth of a guard band through the content of the system informationblock. One possible way is to notify the control channel bandwidth atthe edge of the band and the switch point of the downlink/uplink controlchannel in the radio frame/subframe, in the system information block.For example, the terminal is aware of the number of physical resourceblocks in the system through the system bandwidth in the masterinformation block. Then, the terminal is aware of the number of physicalresource blocks required for the downlink/uplink control channelaccording to the bandwidth of the downlink control channel/uplinkcontrol channel, and obtains a time-frequency structure of a controlsubband located at the band edge through the switch point information.

A simple example is as follows: assuming that a downlink control channelis transmitted in a control subband, of a first subframe of a radioframe located at the upper edge of a band; while an uplink controlchannel is transmitted in a control subband, of a first subframe of aradio frame located at the lower edge of a band; and one radio frameconsists of 7 subframes, each consisting of 14 symbols. And it isassumed that switch time of one symbol is required during the switchbetween downlink and uplink. Through the information in the systeminformation block, it can be learned that the number of physicalresource blocks occupied by the control subband is 3, and the number ofthe switch points of the downlink/uplink control channel in the radioframe is 1. The control channel of the band edge is as shown in FIG. 12.Another possible way is to pre-configure several possible uplink anddownlink configurations of the control channel in a form of an indextable, and the corresponding uplink and downlink configurations of thecontrol channel are informed in the system information block.

Similarly, the terminal determines the distribution of uplink anddownlink subband on the anchor subband through the contents of thesystem information block. For example, it is configured by notifying aradio frame or a switch point in a sub-frame, or configured bypre-fixing uplink and downlink to notify an index. Another possible wayis that the uplink and downlink configurations in the anchor subband arethe same as those in the control subbands of the upper edge of the bandor in the control subbands of the lower edge of the band. In this case,only the uplink and downlink configurations of the control subband needto be notified.

2. The terminal performs a random access process. After determining aframe structure and reading random access channel configurationinformation and preamble sequence resource pool information, theterminal performs a random access process.

There are two ways to perform the random access process:

a. the random access process is only performed on the anchor subband.

Specifically, the terminal transmits a preamble sequence on a randomaccess channel located on an uplink anchor subband. After that,detection of random access response is performed at the designatedlocation on a downlink anchor subband. If the random access response isdetected successfully, message 3 is transmitted at the designatedlocation on the uplink anchor subband, and finally detection ofcontention resolution message is performed at the designated location ofthe downlink anchor subband.

Specifically, the anchor subband structure is as shown in FIG. 13, whichis composed of two parts, that is, an uplink slot and a downlink slot.Wherein, the downlink slot comprises a synchronization signal block anda downlink data transmission part; while the uplink slot comprises arandom access channel and an uplink data transmission part. Eachdownlink slot may consist of a plurality of synchronization signalblocks and a plurality of downlink data transmission parts fortransmitting a random access response and contention resolution message.Each uplink slot may comprise a plurality of random access channels anda plurality of uplink data transmission parts for transmitting themessage 3.

To facilitate detection of the random access response, a common downlinkcontrol channel is added in the downlink data transmission part toindicate whether there is a corresponding random access response in thesubsequent downlink data transmission part. One possible way is that thecommon downlink control channel is transmitted in a fixed position (forexample, the first 1 to 3 symbols) by each subframe in the downlink datatransmission part.

b. the random access process can be performed on the subbands other thanthe anchor subbands. In this configuration, the random access preambleis still transmitted on the uplink anchor subband, but the other stepscan be performed on other subbands than the anchor subband.

Specifically, after completing the transmission of the preamblesequence, the terminal detects a random access response on a fixed orpre-determined/configured slot. If control information scrambled by aRouting Area-Radio Network Temporary Identity (RA-RNTI) of a randomaccess channel used for transmitting a preamble sequence is detected ina downlink control channel, the random access response is detected anddecoded in the downlink data transmission band indicated by the controlinformation. If a random access response containing a preamble sequenceidentifier matching with the transmitted preamble sequence is detected,the message 3 is transmitted in the corresponding uplink datatransmission band according to the uplink resource allocationinformation indicated in the random access response. Finally,transmission of contention resolution message is detected on thedownlink data channel.

In this way, during completing the random access process, both of thecontrol subband and the data transmission band will be used. Inconsideration of the random access response, both message 3 andcontention resolution information are transmitted based on scheduleddata, thus spectrum utilization efficiency of this way is somewhathigher from the perspective of an initial access.

Downlink data communication process is as follows:

The terminal performs blind detection in a downlink control channel, andwhen detecting the downlink control information transmitted to theterminal, receives downlink data in the corresponding downlink datatransmission band according to a resource allocation indicationcomprised in the downlink control information.

Uplink data communication process is as follows:

The terminal transmits scheduling request information on an uplinkcontrol channel. After transmitting the scheduling request, the terminaldetects whether there is downlink control information transmitted to theterminal in a downlink control channel after a fixed time or apredetermined time. If corresponding downlink control information isdetected, then uplink data is allocated in the corresponding uplink datatransmission band according to the uplink resource allocationinformation contained therein, and the schematic flowchart of the aboveuplink data communication process is as shown in FIG. 14.

It should be noted that subframes are used as time units in thisembodiment. However, in the actual system, the subframes in theforegoing description may be replaced by slots, mini-slots, or symbolsas the time unit of the frame structure and the data communication flowin the embodiment.

In addition, it should be noted that, in a data transmission band, acontrol subband, and the part for transmitting uplink data and downlinkdata in an anchor subband, a reference signal is required to be insertedto estimate the effective channel.

Embodiment 2

In this embodiment, a communication method based on a frame structure isintroduced in combination with a specific system. The channel framestructure adopted in this embodiment is as shown in FIG. 10.

In this embodiment, when subband-level frequency division multiplexingis combined with time division multiplexing, a data subband is dividedinto a plurality of transmission occasions for transmission of downlinkand uplink data.

A simple example is as shown in FIG. 15, where time unit groupsconsisting of a plurality of subframes/slots/mini-slots/symbols in atime domain and different transmission occasions consisting of aplurality of physical resource blocks in a frequency domain are used fortransmitting uplink or downlink data. On the frequency domain, a guardinterval needs to be reserved between different transmission directions;while on the time domain, guard time needs to be reserved betweendifferent transmission directions, so as to ensure that on the frequencydomain and time frequency, residual interference between adjacent bandsand inter-symbol interference are smaller.

When resource scheduling is performed, resource allocation is performedin the following ways: the resource allocation on the frequency domainis completed by notifying the index of the physical resource block onthe frequency domain. For example, one possible way is to allocatefrequency-domain resources by using a bitmap. The allocation ofresources in the time domain is completed by notifying the assigned timeunit index. For example, allocation of time-domain resources iscompleted by notifying the subframe index.

With the solution provided by this embodiment, there is a switch in theuplink and downlink transmission directions in both the time domain andthe frequency domain. In order to avoid inter-link interference, a guardband needs to be inserted when the transmission direction of the uplinkdata and the downlink data in the frequency domain is switched, andguard time needs to be inserted when the transmission direction of theuplink data and the downlink data in the time domain is switched. Forthe frame structure provided in this embodiment, the insertion of theguard band and the guard time may be completed by ways of scheduling.With physical resource block as its basic unit, the guard band, namely,is one or a plurality of physical resource blocks, the base station maymake the unscheduled physical resource blocks to be a guard band by notscheduling certain physical resource blocks. Similarly, for time-domainresources, these unscheduled time units can also be made to be guardtime by not scheduling certain subframes/slots/mini-slots/symbols.

Another way to insert the guard band and guard time is to insert theguard band and guard time by ways of configuration. For example, for theguard band, the number of the subcarriers used for the guard band at theband edge location of the allocated time-frequency resources is definedin a predetermined manner. Or, the pre-configuration of a plurality oftypes of edge physical resource blocks is required to reserve the numberof the subcarriers used as the guard band, and the terminal is notifiedin form of index through the downlink control channel or higher layersignaling configuration. A simple example is to configure the number ofguard band subcarriers through the configuration table shown in Table 3.

TABLE 3 configuration of the number of subcarriers reserved in guardband Index Number of reserved subcarriers 0 1 1 2 2 3 . . . . . .

According to the configuration table shown in Table 3 above, the basestation simultaneously notifies the index corresponding to the number ofsubcarriers for the guard band at the edge of the band while allocatingresources. The terminal performs rate adaptation according to the numberof the reserved subcarriers and performs data transmission.

For the guard time, a predetermined number of symbols/slots/mini-slotsreserved at the cutoff of the allocated time resources can also be fixedas guard time in a preset way. Another possible way is to notify theguard time in form of index through a pre-configured index tablecomprising several types of reserved time units. A possible way is asshown in Table 4.

TABLE 4 number configuration of time units reserved in guard time IndexNumber of reserved time units 0 1 1 2 2 3 . . . . . .

In the example shown in Table 4 above, the time unit may be asymbol/slot/mini-slot or the like. The terminal is notified of the indexalong with the resource configuration information through the downlinkcontrol channel, or by way of semi-static through a high-level signalingconfiguration. After acquiring the information of the number of thereserved time units, the terminal performs rate adaptation on thetransmitted information according to the information and transmits theinformation on the specified time-frequency resource.

Embodiment 3

In this embodiment, a communication method based on frame structure isintroduced in combination with a specific system. In this embodiment,the location of an anchor subband may not be limited to the center ofthe entire band. In contrast, an anchor subband may be located near thecontrol subband at the edge of the band.

One possible channel structure is as shown in FIG. 16. In this example,the control subband is still located at the edge of the band while theanchor subband is located near the control subband on one side, and thedownlink anchor subband is ensured to be adjacent to the downlinkcontrol channel. At the same time, the uplink anchor subband is adjacentto the uplink control channel. The rest of the time-frequency resourcesare used to transmit a data transmission band. Wherein, the exampleshown in FIG. 16 is an extreme example.

In other possible configurations, the anchored band is not located inthe middle of the band, as shown in FIG. 17.

For the channel structure shown in this embodiment, the communicationflow between a terminal and a base station also needs to be adjustedcorrespondingly. Specifically, in the initial access process, theterminal accesses initially through a synchronization signal block in adownlink anchor subband, completes a downlink synchronization process,reads the system bandwidth information from the master information blockin a broadcast channel in the corresponding synchronization signalblock, and reads the location where the anchor subband is located in thesystem band from the master information block or the system informationblock indicated by the master information block.

One possible way is to transmit the offset of the anchor subband centerrelative to the center frequency in the master information block or thesystem information block indicated by the master information block,wherein the offset value can be characterized by the number of physicalresource blocks. At the same time, the sign of the offset value(positive or negative) indicates the offset direction of the anchorsubband relative to the center frequency. The notice can be performed byway of an index table.

Another possible way is to transmit the index of the first physicalresource block of the anchor subband in the master information block orthe system information block indicated by the master information blockto indicate the location of the anchor subband in the entire systembandwidth.

The terminal acquires the frequency domain location of the anchorsubband through downlink synchronization and reads the offset value ofthe anchor subband relative to the center frequency from the masterinformation block or the system information block indicated by themaster information block to determine the location of the entire systembandwidth. The structure of the entire system bandwidth is determined incombination with the master information block or the notice of thesystem bandwidth structure in the system information block.

In the solution provided in this embodiment, the remaining communicationflows, including the random access process and the uplink/downlink datacommunication steps, may adopt the solutions provided in the foregoingEmbodiment 1 and Embodiment 2, and thus are not specifically describedherein.

Based on the communication method based on frame structure provided bythe present disclosure, the present disclosure further provides acommunication apparatus based on frame structure. As shown in FIG. 18,the apparatus comprises:

a downlink processing unit 1801 configured to detect a synchronizationsignal block, perform downlink synchronization processing with a basestation according to the detected synchronization signal block, anddetermine time-frequency resources of an anchor subband;

an uplink processing unit 1802 configured to acquire random accessconfiguration information according to the time-frequency resources ofthe anchor subband, perform a random access process according to therandom access configuration information, and complete uplinksynchronization; and

a communication unit 1803 configured to acquire control information in acontrol channel band, and perform data communication with the basestation in a data transmission band.

Preferably, the uplink processing unit 1802 is configured to detect asystem information block on the anchor subband after a first preset timeinterval, and acquire the random access configuration informationcarried in the detected system information block. Or,

The uplink processing unit 1802 is further configured to determine thelocation of the anchor subband according to the result of the downlinksynchronous processing, acquire a master information block carried by abroadcast channel in the synchronization signal block; and acquire therandom access configuration information carried in the masterinformation block. Or,

The uplink processing unit 1802 is further configured to determine thelocation of the anchor subband according to the result of the downlinksynchronous processing, and acquire a master information block carriedby a broadcast channel in the synchronization signal block; anddetermine a system information block according to the master informationblock, and acquire random access configuration information carried inthe system information block.

Preferably, the uplink processing unit 1802 is specifically configuredto acquire the time-domain index of the system information blockindicated in the master information block, determine the location of thetime-frequency resource of the system information block according to thetime-domain index, and determine the system information block in theanchor subband according to the location of the time-frequency resource.

Wherein, the system information block is transmitted in the anchorsubband or data transmission band.

Preferably, the uplink processing unit 1802 is configured to transmit arandom access preamble sequence to a base station through an uplinkanchor subband according to the random access configuration information,detect a random access response on a downlink anchor subband, transmitmessage 3 on the uplink anchor subband if detecting the random accessresponse, and detect a contention resolution on a downlink anchorsubband.

The uplink processing unit 1802 is configured to transmit a randomaccess preamble sequence to a base station through an uplink anchorsubband according to the random access configuration information; detectthe control information of the uplink anchor subband used fortransmitting the random access preamble sequence in a downlink controlchannel, and detect and decode random access response in a downlink datatransmission band indicated by the control information; transmit message3 in an uplink data transmission band if a random access responsecontaining a preamble sequence identifier matching with the transmittedrandom access preamble sequence is detected; and detect a contentionresolution on the downlink data transmission band.

Preferably, the communication unit 1803 is configured to detect in adownlink control channel, and receive downlink data in the correspondingdownlink data transmission band according to the resource allocationindication carried in the downlink control information when detectingthe downlink control information is transmitted to itself, and is alsoconfigured to transmit a scheduling request in an uplink controlchannel, detect in the downlink control channel after a second presettime interval, and allocate uplink data in the corresponding uplink datatransmission band according to the uplink resource allocation indicationcarried in the downlink control information when detecting the downlinkcontrol information transmitted to itself.

A configuration unit 1804 is configured to acquire a configuration indexof a guard band and/or guard time transmitted by the base station, andset according to the configuration index to provide protection whenperforming data communication with the base station.

The present disclosure further provides a communication apparatus basedon the frame structure. As shown in FIG. 19, the apparatus comprises:

an uplink processing unit 1901 configured to perform a random accessprocess with a terminal according to random access configurationinformation transmitted by the terminal through an anchor subband; and

a communication unit 1902 configured to perform data communication withthe terminal in a data transmission band.

Preferably,

the uplink processing unit 1901 is configured to receive random accessconfiguration information, carrying a random access preamble sequence,transmitted by the terminal through an uplink anchor subband; performrandom access according to the random access preamble sequence, andtransmit a random access response; detect message 3 on the uplink anchorsubband; and transmit a contention resolution on a downlink anchorsubband.

Or, the uplink processing unit 1901 is configured to receive randomaccess configuration information, carrying a random access preamblesequence, transmitted by the terminal through an uplink anchor subband;perform random access according to the random access preamble sequence,transmit the control information of the uplink anchor subband used bythe random access preamble sequence in a downlink control channel, andtransmit a random access response in a downlink data transmission band;detect message 3 in an uplink data transmission band; and transmit acontention resolution on the downlink data transmission band.

Preferably, the communication unit 1902 is configured to transmitdownlink control information in a downlink control channel, so that theterminal detects the downlink control information in the downlinkcontrol channel; and further configured to receive a scheduling requestin an uplink control channel, and transmit the downlink controlinformation in the downlink control channel, so that the terminaldetects the downlink control information in the downlink controlchannel.

A transmitting unit 1903 is configured to transmit a configuration indexof a guard band and guard time, so that the terminal provides protectionaccording to the configuration index when performing data communication.

The present disclosure provides a frame structure based on new duplexmode. By adopting the frame structure based on new duplex mode providedby the present disclosure, the advantages of the traditional timedivision duplex and frequency division duplex can be obtained at thesame time, and the scheduling flexibility is greatly increased.Specifically, since the control channel exists at any time, the HARQprocess will be greatly simplified and the scheduling delay will bereduced. Moreover, since a paired spectrum is not needed, the methodprovided by the present disclosure improves utilization ratio ofspectrum relative to frequency division duplex.

The solution provided by the present disclosure is also more suitablefor the implementation of a large-scale MIMO system because downlinkchannel state information can be obtained by a time-divided datatransmission band part in a time domain.

In conclusion, the scheme provided by the present disclosure providesmore sufficient frequency spectrum utilization than the traditionalfrequency division duplex and time division duplex, and simultaneouslycombines the advantages of the two types of duplex modes.

Embodiments of the present disclosure are described in detail below,examples of which are illustrated in the accompanying drawings, in whichthe same or similar reference numbers denote the same or similarelements or elements having the same or similar functions throughout.The embodiments described below with reference to the drawings areexemplary for explaining the present disclosure only, and should not beconstrued as limiting the present disclosure.

It will be understood by the skilled in the art that singular forms “a”,“an”, “said” and “the” used herein may also include plural forms, unlessspecifically stated. It should be further understood that the word“comprising” used in the description of the present disclosure refers topresence of features, integers, steps, operations, elements, and/orcomponents, but does not exclude presence or addition of one or moreother features, Integers, steps, operations, elements, components,and/or combinations thereof. It should be understood that when anelement is referred to as being “connected” or “coupled” to anotherelement, it can be directly connected or coupled to the other element,or there may also be intermediate elements. In addition, “connected” or“coupled” as used herein may include wirelessly connected or wirelesslycoupled. As used herein, the phrase “and/or” includes all or any of oneor more of associated listed items, and all of combinations thereof.

It may be understood by the skilled in the art that, unless otherwisedefined, all terms (including technical and scientific terms) usedherein have the same meaning as commonly understood by the skilled inthe art to which the present disclosure belongs. It should also beunderstood that the terms such as those defined in a general dictionaryshould be understood as having a meaning that is consistent with that inthe context of the prior art, and will not be explained with anidealized or too formal meaning, unless specifically defined herein.

The skilled in the art may understand that the “terminal” and “terminaldevice” used herein include not only a wireless signal receiver device,which is a device only having a wireless signal receiver without atransmitting capability, but also a device with receiving andtransmitting hardware, which is a device having receiving andtransmitting hardware capable of performing a bidirectionalcommunication over a bidirectional communication link. Such a device mayinclude: a cellular or other communication device having a single linedisplay or a multi-line display or a cellular or other communicationdevice without a multi-line display; a Personal Communication Service(PCS), which may combine voice, data processing, fax and/or datacommunication capabilities; a Personal Digital Assistant (PDA), whichmay include a Radio Frequency (RF) receiver, a pager, Internet/Intranetaccess, a web browser, a notepad, a calendar, and/or a GlobalPositioning System (GPS) receiver; a conventional laptop and/or palmtopcomputer or other device, which may be a conventional laptop and/orpalmtop computer or other device having and/or including an RF receiver.The “terminal”, “terminal device” as used herein may be portable,transportable, installed in a vehicle (of aviation, maritime, and/orland), or may be adapted and/or configured to operate locally, and/ormay operate in a distributed form on the earth and/or at any otherlocations in space. The “terminal” and “terminal device” used herein mayalso be a communication terminal, an Internet terminal, a music/videoplaying terminal, such as a PDA, a Mobile Internet Device (MID), and/ora mobile phone having a music/video playback function, or a smart TV, aset-top box and other devices. In addition, “terminal” and “terminaldevice” may also be replaced with “user” and “UE”.

FIG. 20 shows an exemplary wireless communication system 2004 to whichan exemplary embodiment of the present disclosure is applied. In FIG.20, a UE detects indication information. The wireless communicationsystem 2000 includes one or more fixed infrastructure base units,forming a network which is distributed over a geographic area. The baseunit may also be referred to as an Access Point (AP), an Access Terminal(AT), a Base Station (BS), a Node-B, and an evolved NodeB (eNB), a nextgeneration BS (gNB), or other terms used in the art. The access point inthe embodiment of the present disclosure may be replaced with any of theabove terms. As shown in FIG. 20, one or more base stations 2001 and2002 provide services for several Mobile Stations (MSs) or UEs orterminal devices or terminals 2003 and 2004 in a service area. Forexample, the service area may be a cell or a cell section. In somesystems, one or more BSs may be communicatively coupled to a controllerforming an access network, and the controller may be communicativelycoupled to one or more core networks. Examples in the present disclosureare not limited to any of particular wireless communication systems.

In a time and/or frequency domain, the base stations 2001 and 2002transmit Downlink (DL) communication signals 2012 and 2013 to the UEs2003 and 2004, respectively. The UEs 2003 and 2004 communicate with oneor more base units 2001 and 2002 via Uplink (UL) communication signals2011 and 2014, respectively. In one embodiment, the mobile communicationsystem 2000 is an Orthogonal Frequency Division Multiplexing(OFDM)/Orthogonal Frequency Division Multiple Access (OFDMA) systemincluding a plurality of base stations and a plurality of UEs. Theplurality of base stations include the base station 2001 and the basestation 2002, and the plurality of UEs include the UE 2003 and the UE2004. The base station 2001 communicates with the UE 2003 through the ULcommunication signal 2011 and the DL communication signal 2012. When thebase station has a DL packet to be transmitted to UEs, each UE mayobtain a DL allocation (resource), such as a set of radio resources in aPhysical Downlink Shared Channel (PDSCH) or a Narrowband Downlink SharedChannel (NPDSCH). When the terminal needs to transmit a packet to thebase station in the UL, the UE obtains from the base station anauthorization which allocates Physical Uplink Shared Channel (PUSCH) orNarrowband Uplink Shared Channel (NPUSCH) containing a set of UL radioresources. The UE obtains DL or UL scheduling information from aPhysical Downlink Control Channel (PDCCH), or MPDCCH, or EPDCCH orNPDCCH dedicated to itself. The DL or UL scheduling information andother control information carried on the DL control channel are referredto as Downlink Control Information (DCI). FIG. 20 also shows differentphysical channels in DL 2012 and UL 2011. The DL 2012 includes a PDCCHor EPDCCH or NPDCCH or MPDCCH 2021, a PDSCH or NPDSCH 2022, a PhysicalControl Formation Indicator Channel (PCFICH) 2023, a Physical MulticastChannel (PMCH) 2024, a Physical Broadcast Channel (PBCH) or a NarrowbandPhysical Broadcast Channel (NPBCH) 2025, a Physical Hybrid AutomaticRepeat Request Indicator Channel (PHICH) 2026, and a PrimarySynchronization Signal (PSS), a Secondary Synchronization Signal (SSS),or a Narrowband Primary Synchronization Signal/Secondary SynchronizationSignal (NPSS/NSSS) 12x. The DL control channel 2021 transmits a DLcontrol signal to the terminal. The DCI 2020 is carried on the DLcontrol channel 2021. The PDSCH 2022 transmits data information to theUE. The PCFICH 2023 transmits information for decoding PDCCH, e.g.,dynamically indicating the number of symbols used by the PDCCH 2021.PMCH 2024 carries broadcast/multicast information. The PBCH or NPBCH2025 carries a Master Information Block (MIB) for early UE discovery andcell-wide coverage. The PHICH carries Hybrid Automatic Repeat reQuest(HARD) information that indicates whether the base station has correctlyreceived the UL transmission signal. The UL 2011 includes a PhysicalUplink Control Channel (PUCCH) 2031, a PUSCH 2032, and a Physical RandomAccess Channel (PRACH) 2033 that carries random access information.

In one embodiment, the wireless communication network 2000 uses an OFDMAor multi-carrier architecture, including Adaptive Modulation and Coding(AMC) on DL and a next-generation single-carrier FDMA architecture ormulti-carrier OFDMA architecture for UL transmission. The FDMA-basedsingle-carrier architecture includes Discrete Fourier Transform-SpreadOrthogonal Frequency Division Multiplexing (DFT-SOFDM) of InterleavedFrequency Division Multiple Access (IFDMA), Localized FDMA (LFDMA),IFDMA, or LFDMA, and also includes various enhanced Non-OrthogonalMultiple Access (NOMA) architectures of an OFDMA system, e.g., PatternDivision Multiple Access (PDMA), Sparse Code Multiple Access (SCMA),Multi-User Shared Access (MUSA), Low Code Rate Spreading FrequencyDomain Spreading (LCRS FDS), Non-Orthogonal Coded Multiple Access(NCMA), Resource Spreading Multiple Access (RSMA), Interleave-GridMultiple Access (IGMA), Low Density Spreading With Signature VectorExtension (LDS-SVE), Low code rate and Signature based Shared Access(LSSA), Non-Orthogonal Coded Access (NOCA), Interleave Division MultipleAccess (IDMA), Repetition Division Multiple Access (RDMA), GroupOrthogonal Coded Access (GOCA), Welch-bound equality based Spread MA(WSMA), etc.

In the OFDMA system, a remote unit is served by allocating DL or ULradio resources that typically include a set of subcarriers on one ormore OFDM symbols. Exemplary OFDMA protocols include developed LTE andIEEE 802.16 standards of 3GPP UMTS standards. The architecture may alsoinclude the use of transmission technologies, such as Multi-Carrier CDMA(MC-CDMA), Multi-Carrier Direct Sequence CDMA (MC-DS-CDMA), andOrthogonal Frequency and Code Division Multiplexing (OFCDM) inone-dimensional or two-dimensional transmission, or may be based on asimpler time and/or frequency division multiplexing/multiple accesstechnology, or a combination of these different technologies. In analternative embodiment, the communication system may use other cellularcommunication system protocols, including but not limited to TDMA ordirect sequence CDMA.

A random access preamble format in the future wireless communicationsystems can be represented as shown in Table 5 below. For the preambleformats with numbers A1, A2, A3, B1, B2, B3, B4, C0, C2, values of μ,may be 0, 1, 2, 3, and κ=T_(s)/(1/30720) is a ratio of an actualsampling interval to a reference sampling interval, where Ts is theactual sampling interval in ms.

TABLE 5 Random Access Preamble Format Length of Preamble Length In TimeDomain Cyclic Format (L) of Subcarrier (Unit: Sampling Prefix No.Preamble Spacing Interval) Length 0 839 1.25 kHz 24576κ 3168κ  1 8391.25 kHz 2 · 24576κ 21024κ  2 839 1.25 kHz 4 · 24576κ 4688κ 3 839 5 kHz4 · 6144κ  3168κ A1 139 15 · 2^(μ) kHz 2 · 2048κ · 2^(−μ) 288κ · 2^(−μ)A2 139 15 · 2^(μ) kHz 4 · 2048κ · 2^(−μ) 576κ · 2^(−μ) A3 139 15 · 2^(μ)kHz 6 · 2048κ · 2^(−μ) 864κ · 2^(−μ) B1 139 15 · 2^(μ) kHz 2 · 2048κ ·2^(−μ) 216κ · 2^(−μ) B2 139 15 · 2^(μ) kHz 4 · 2048κ · 2^(−μ) 360κ ·2^(−μ) B3 139 15 · 2^(μ) kHz 6 · 2048κ · 2^(−μ) 504κ · 2^(−μ) B4 139 15· 2^(μ) kHz 12 · 2048κ · 2^(−μ)  936κ · 2^(−μ) C0 139 15 · 2^(μ) kHz2048κ · 2^(−μ) 1240κ · 2^(−μ)  C2 139 15 · 2^(μ) kHz 4 · 2048κ · 2^(−μ)2048κ · 2^(−μ) 

The random access preamble formats are predefined for the futurewireless communication systems. In the above defined formats, theactually used random access preamble formats (or a combination thereof)include in total 14 formats: 0, 1, 2, 3, A1, A2, A3, B1, B4, A1/B1,A2/B2, A3/B3, C0 and C2. Among those formats, the format A1/B1represents a combination of several A1s and several B1s in a certainorder as a format for use, the format A2/B2 represents a combination ofseveral A2s and several B2s in a certain order as a format for use, andthe format A3/B3 represents a combination of several A3s and several B3sin a certain order as a format for use. It should be noted that theformats A1, A2, A3, B1, B4, A1/B1, A2/B2, A3/B3, C0, C2 respectivelyhave sub-formats with different subcarrier spacing sizes. Specifically,when the values of μ are different (μ=0, 1, 2, 3), A1, A2, A3, B1, B4,A1/B1, A2/B2, A3/B3, C0, and C2 further have 4 different sub-formats. Inthis case, there are 44 different random access preamble formats of 0,1, 2, 3, A1 (15/30/60/120 kHz), A2 (15/30/60/120 kHz), A3 (15/30/60/120kHz)), B1 (15/30/60/120 kHz), B4 (15/30/60/120 kHz), A1/B1 (15/30/60/120kHz), A2/B2 (15/30/60/120 kHz, A3/B3 (15/30/60/120 kHz), C0(15/30/60/120 kHz), and C2 (15/30/60/120 kHz) in total, in which15/30/60/120 kHz represents a random access preamble subcarrier spacingwith 15 kHz or 30 kHz or 60 kHz or 120 kHz, respectively.

Hereinafter, a flowchart of a method of determining a random accesspreamble transmit power performed at a base station according to anexemplary embodiment of the present disclosure will be described indetail with reference to FIG. 21.

FIG. 21 schematically shows a flowchart of a method 200 of determining arandom access preamble transmit power performed at a base stationaccording to an exemplary embodiment of the present disclosure. As shownin FIG. 21, the method 200 may include steps 2101 and 202.

In Step 2101, the base station may generate random access configurationinformation. The random access configuration information includes arandom access configuration index and random access preamble subcarrierspacing indication information.

The length of the random access configuration information is 9 bits,among which 8 bits are prach-ConfigIndex numbered as 0-255, indicatingmost of the random access configuration information including the randomaccess preamble format (It should be noted that the preamble formatindicated by prach-ConfigIndex may include subcarrier spacinginformation of the preamble, or may not include subcarrier spacinginformation of the preamble. If the preamble format indicated byprach-ConfigIndex is A1, A2, A3, B1, B4, A1/B1, A2/B2, A3/B3, C0 or C2,the preamble format does not include subcarrier spacing information; andif the preamble format indicated by prach-ConfigIndex is 0, 1, 2 or 3,the preamble format includes subcarrier spacing information); and 1 bitis prach-Msg1 SubcarrierSpacing, indicating random access preamblesubcarrier spacing information when the preamble format is A1, A2, A3,B1, B4, A1/B1, A2/B2, A3/B3, C0, or C2.

In Step 2102, the base station may transmit the random accessconfiguration information to the UE.

In an exemplary embodiment, the random access configuration informationis included in a broadcast message transmitted to the UE through aPhysical Broadcast Channel (PBCH) or a New Radio-Physical BroadcastChannel (NR-PBCH). The broadcast message includes carrier rangeinformation of the system (above 6 GHz or below 6 GHz) and RemainingSystem Information (RMSI) indication information. Specifically, therandom access configuration information is included in the RMSIindication information.

In an exemplary embodiment, the UE may detect the broadcast message,obtain the carrier range information and the RMSI indication informationin the broadcast message, and determine whether the carrier range of thesystem is above 6 GHz or below 6 GHz. The UE may also read RMSI based onthe obtained RMSI indication information, so as to obtain the randomaccess configuration information therein.

The UE may obtain the random access preamble format based on the randomaccess configuration index prach-ConfigIndex and the random accesspreamble subcarrier spacing indication informationprach-Msg1SubcarrierSpacing in the obtained random access configurationinformation, so as to determine an random access preamble transmit poweroffset DELTA_PREAMBLE corresponding to the obtained random accesspreamble format, which will be described in detail later.

Hereinafter, a structure of a base station according to an exemplaryembodiment of the present disclosure will be described with reference toFIG. 22. FIG. 22 schematically shows a structural block diagram of abase station 2200 according to an exemplary embodiment of the presentdisclosure. The base station 2200 may be used to perform the method 200described with reference to FIG. 21. For the sake of brevity, only aschematic structure of the base station according to the exemplaryembodiment of the present disclosure will be described herein, and thedetails which have been described in the method 200 with reference toFIG. 21 will thus be omitted.

As shown in FIG. 22, the base station 2200 includes a communicationinterface 2201 for external communication, a processing unit or aprocessor 2203, which may be a single unit or a combination of multipleunits for performing different steps of the method; a memory 2205storing computer-executable instructions, which when executed by theprocessor 2203, cause the processor 2203 to: generate random accessconfiguration information, the random access configuration informationincluding a random access configuration index and random access preamblesubcarrier spacing indication information; and transmit the randomaccess configuration information to the UE.

As described above, the random access configuration index and the randomaccess preamble subcarrier spacing indication information may be used bythe UE to obtain the random access preamble format.

Hereinafter, a flowchart of a method of determining a random accesspreamble sequence transmit power performed at a UE according to anexemplary embodiment of the present disclosure will be described indetail with reference to FIG. 23.

FIG. 23 schematically shows a flowchart of a method 2300 of determininga random access preamble transmit power performed at a UE according toan exemplary embodiment of the present disclosure. As shown in FIG. 23,the method 2300 may include steps 2301, 2302 and 2303.

In Step 2301, the UE may obtain random access configuration informationfrom a base station. The random access configuration informationincludes a random access configuration index and random access preamblesequence subcarrier spacing indication information.

The length of the random access configuration information is 9 bits,among which 8 bits are prach-ConfigIndex numbered as 0-255, indicatingmost of the random access configuration information including the randomaccess preamble format (It should be noted that the preamble formatindicated by prach-ConfigIndex may include subcarrier spacinginformation of the preamble, or may not include subcarrier spacinginformation of the preamble. If the preamble format indicated byprach-ConfigIndex is A1, A2, A3, B1, B4, A1/B1, A2/B2, A3/B3, C0 or C2,the preamble format does not include subcarrier spacing information; andif the preamble format indicated by prach-ConfigIndex is 0, 1, 2 or 3,the preamble format includes subcarrier spacing information); and 1 bitis prach-Msg1 SubcarrierSpacing, indicating random access preamblesubcarrier spacing information when the preamble format is A1, A2, A3,B1, B4, A1/B1, A2/B2, A3/B3, C0, or C2.

In an exemplary embodiment, the UE receives a broadcast messagetransmitted on a physical broadcast channel (PBCH or NR-PBCH) from thebase station. The broadcast message includes carrier range informationof the system (above 6 GHz or below 6 GHz) and RMSI indicationinformation. Specifically, the random access configuration informationis included in the RMSI indication information.

In an exemplary embodiment, the UE may detect the broadcast message,obtain the carrier range information and the RMSI indication informationin the broadcast message, and determine whether the carrier range of thesystem is above 6 GHz or below 6 GHz. The UE may also read RMSI based onthe obtained RMSI indication information, so as to obtain the randomaccess configuration information therein.

In Step 2302, the UE may obtain a random access preamble format based onthe random access configuration index and the random access preamblesubcarrier spacing indication information.

As described previously, the random access preamble formats arepredefined for the future wireless communication systems. In the abovedefined formats, the actually used random access preamble formats (or acombination thereof) include in total 14 formats: 0, 1, 2, 3, A1, A2,A3, B1, B4, A1/B1, A2/B2, A3/B3, C0 and C2. Among those formats, theformat A1/B1 represents a combination of several A1 s and several B1s ina certain order as a format for use, the format A2/B2 represents acombination of several A2s and several B2s in a certain order as aformat for use, and the format A3/B3 represents a combination of severalA3s and several B3s in a certain order as a format for use. It should benoted that the formats A1, A2, A3, B1, B4, A1/B1, A2/B2, A3/B3, C0, C2respectively have sub-formats with different subcarrier spacing sizes.Specifically, when the values of μ, are different (μ=0, 1, 2, 3), A1,A2, A3, B1, B4, A1/B1, A2/B2, A3/B3, C0, and C2 further have 4 differentsub-formats. In this case, there are 44 different random access preambleformats of 0, 1, 2, 3, A1 (15/30/60/120 kHz), A2 (15/30/60/120 kHz), A3(15/30/60/120 kHz)), B1 (15/30/60/120 kHz), B4 (15/30/60/120 kHz), A1/B1(15/30/60/120 kHz), A2/B2 (15/30/60/120 kHz, A3/B3 (15/30/60/120 kHz),C0 (15/30/60/120 kHz), and C2 (15/30/60/120 kHz) in total, in which15/30/60/120 kHz represents a random access preamble subcarrier spacingwith 15 kHz or 30 kHz or 60 kHz or 120 kHz, respectively.

The UE may store a predefined correspondence between random accesspreamble formats and random access preamble transmit power offsetsDELTA_PREAMBLE locally. Alternatively, the UE may store a predefinedcorrespondence between random access preamble formats, random accesspreamble subcarrier spacing indication information, carrier ranges andrandom access preamble transmit power offsets DELTA_PREAMBLE.

In Step 2303, the UE may determine a random access preamble transmitpower offset DELTA_PREAMBLE corresponding to the obtained random accesspreamble format.

In an exemplary embodiment, the UE may determine the random accesspreamble transmit power offset DELTA_PREAMBLE corresponding to theobtained random access preamble format by querying a correspondencetable including at least random access preamble formats and randomaccess preamble transmit power offsets DELTA_PREAMBLE.

In another exemplary embodiment, the correspondence table may furtherinclude at least one of the random access preamble subcarrier spacingindication information and the carrier range. In this case, the randomaccess preamble transmit power offset corresponding to the obtainedrandom access preamble format and at least one of the random accesspreamble subcarrier spacing indication information and the carrier rangemay be determined by querying the correspondence table.

It should be noted that the random access preamble format may refer toany of the formats which are independent of the random access preamblesubcarrier spacing, such as 0, 1, 2, 3, A1, A2, A3, B1, B4, A1/B1,A2/B2, A3/B3, C0 and C2, or may refer to any of the formats which aredependent on the random access preamble subcarrier spacing, such as 0,1, 2, 3, A1 (15/30/60/120 kHz), A2 (15/30/60/120 kHz), A3 (15/30)/60/120kHz), B1 (15/30/60/120 kHz), B4 (15/30/60/120 kHz), A1/B1 (15/30/60/120kHz), A2/B2 (15/30/60/120 kHz), A3/B3 (15/30/60/120 kHz), C0(15/30/60/120 kHz) and C2 (15/30/60/120 kHz).

A possible correspondence between random access preamble formats andrandom access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 6. As described above, in the following description,DELTA_PREAMBLE refers to a random access preamble transmit power offset,Msg1 SCS refers to random access preamble sequence subcarrier spacingindication information, 0, 1, 2, 3, A1, A2, A3, B1, B4, A1/B1, A2/B2,A3/B3, C0 and C2 refer to defined random access preamble formats, and 15kHz, 30 kHz, 60 kHz, and 120 kHz are random access preamble subcarrierspacing.

TABLE 6 Correspondence Table of Random Access Preamble Format andDELTA_PREAMBLE Random Access Preamble Format DELTA_PREAMBLE 0 0 dB 1 −3dB 2 −6 dB 3 0 dB A1 (15 kHz) 8 dB A2 (15 kHz) 5 dB A3 (15 kHz) 3 dB B1(15 kHz) 8 dB B4 (15 kHz) 0 dB A1/B1 (15 kHz) 8 dB A2/B2 (15 kHz) 5 dBA3/B3 (15 kHz) 3 dB C0 (15 kHz) 11 dB C2 (15 kHz) 5 dB A1 (30 kHz) 11 dBA2 (30 kHz) 8 dB A3 (30 kHz) 6 dB B1 (30 kHz) 11 dB B4 (30 kHz) 3 dBA1/B1 (30 kHz) 11 dB A2/B2 (30 kHz) 8 dB A3/B3 (30 kHz) 6 dB C0 (30 kHz)14 dB C2 (30 kHz) 8 dB A1 (60 kHz) 14 dB A2 (60 kHz) 11 dB A3 (60 kHz) 9dB B1 (60 kHz) 14 dB B4 (60 kHz) 6 dB A1/B1 (60 kHz) 14 dB A2/B2 (60kHz) 11 dB A3/B3 (60 kHz) 9 dB C0 (60 kHz) 17 dB C2 (60 kHz) 11 dB A1(120 kHz) 17 dB A2 (120 kHz) 14 dB A3 (120 kHz) 12 dB B1 (120 kHz) 17 dBB4 (120 kHz) 9 dB A1/B1 (120 kHz) 17 dB A2/B2 (120 kHz) 14 dB A3/B3 (120kHz) 12 dB C0 (120 kHz) 20 dB C2 (120 kHz) 14 dB

Another possible correspondence between random access preamble formatsand random access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 7.

TABLE 7 Correspondence Table of Random Access Preamble Format andDELTA_PREAMBLE Random Access Preamble Format DELTA_PREAMBLE 0 0 dB 1 −3dB 2 −6 dB 3 0 dB A1 (15 kHz) 7.8 dB A2 (15 kHz) 4.8 dB A3 (15 kHz) 3 dBB1 (15 kHz) 7.8 dB B4 (15 kHz) 0 dB A1/B1 (15 kHz) 7.8 dB A2/B2 (15 kHz)4.8 dB A3/B3 (15 kHz) 3 dB C0 (15 kHz) 10.8 dB C2 (15 kHz) 4.8 dB A1 (30kHz) 10.8 dB A2 (30 kHz) 7.8 dB A3 (30 kHz) 6 dB B1 (30 kHz) 10.8 dB B4(30 kHz) 3 dB A1/B1 (30 kHz) 10.8 dB A2/B2 (30 kHz) 7.8 dB A3/B3 (30kHz) 6 dB C0 (30 kHz) 13.8 dB C2 (30 kHz) 7.8 dB A1 (60 kHz) 13.8 dB A2(60 kHz) 10.8 dB A3 (60 kHz) 9 dB B1 (60 kHz) 13.8 dB B4 (60 kHz) 6 dBA1/B1 (60 kHz) 13.8 dB A2/B2 (60 kHz) 10.8 dB A3/B3 (60 kHz) 9 dB C0 (60kHz) 16.8 dB C2 (60 kHz) 10.8 dB Al (120 kHz) 16.8 dB A2 (120 kHz) 13.8dB A3 (120 kHz) 12 dB B1 (120 kHz) 16.8 dB B4 (120 kHz) 9 dB A1/B1 (120kHz) 16.8 dB A2/B2 (120 kHz) 13.8 dB A3/B3 (120 kHz) 12 dB C0 (120 kHz)19.8 dB C2 (120 kHz) 13.8 dB

Another possible correspondence between random access preamble formatsand random access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 8.

TABLE 8 Correspondence Table of Random Access Preamble Format andDELTA_PREAMBLE Random Access Preamble Format DELTA_PREAMBLE 0 0 dB 1 −3dB 2 −6 dB 3 0 dB A1 (15 kHz) 0 dB A2 (15 kHz) −3 dB A3 (15 kHz) −5 dBB1 (15 kHz) 0 dB B4 (15 kHz) −8 dB A1/B1 (15 kHz) 0 dB A2/B2 (15 kHz) −3dB A3/B3 (15 kHz) −5 dB C0 (15 kHz) 3 dB C2 (15 kHz) −3 dB A1 (30 kHz) 3dB A2 (30 kHz) 0 dB A3 (30 kHz) −2 dB B1 (30 kHz) 3 dB B4 (30 kHz) −5 dBA1/B1 (30 kHz) 3 dB A2/B2 (30 kHz) 0 dB A3/B3 (30 kHz) −2 dB C0 (30 kHz)6 dB C2 (30 kHz) 0 dB A1 (60 kHz) 6 dB A2 (60 kHz) 3 dB A3 (60 kHz) 1 dBB1 (60 kHz) 6 dB B4 (60 kHz) −2 dB A1/B1 (60 kHz) 6 dB A2/B2 (60 kHz) 3dB A3/B3 (60 kHz) 1 dB C0 (60 kHz) 9 dB C2 (60 kHz) 3 dB A1 (120 kHz) 9dB A2 (120 kHz) 6 dB A3 (120 kHz) 4 dB B1 (120 kHz) 9 dB B4 (120 kHz) 1dB A1/B1 (120 kHz) 9 dB A2/B2 (120 kHz) 6 dB A3/B3 (120 kHz) 4 dB C0(120 kHz) 12 dB C2 (120 kHz) 6 dB

Another possible correspondence between random access preamble formatsand random access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 9.

TABLE 9 Correspondence Table of Random Access Preamble Format andDELTA_PREAMBLE Random Access Preamble Format DELTA_PREAMBLE 0 0 dB 1 −3dB 2 −6 dB 3 0 dB A1 (15 kHz) 0 dB A2 (15 kHz) −3 dB A3 (15 kHz) −4.8 dBB1 (15 kHz) 0 dB B4 (15 kHz) −7.8 dB A1/B1 (15 kHz) 0 dB A2/B2 (15 kHz)−3 dB A3/B3 (15 kHz) −4.8 dB C0 (15 kHz) 3 dB C2 (15 kHz) −3 dB A1 (30kHz) 3 dB A2 (30 kHz) 0 dB A3 (30 kHz) −1.8 dB B1 (30 kHz) 3 dB B4 (30kHz) −4.8 dB A1/B1 (30 kHz) 3 dB A2/B2 (30 kHz) 0 dB A3/B3 (30 kHz) −1.8dB C0 (30 kHz) 6 dB C2 (30 kHz) 0 dB A1 (60 kHz) 6 dB A2 (60 kHz) 3 dBA3 (60 kHz) 1.2 dB B1 (60 kHz) 6 dB B4 (60 kHz) −1.8 dB A1/B1 (60 kHz) 6dB A2/B2 (60 kHz) 3 dB A3/B3 (60 kHz) 1.2 dB C0 (60 kHz) 9 dB C2 (60kHz) 3 dB A1 (120 kHz) 9 dB A2 (120 kHz) 6 dB A3 (120 kHz) 4.2 dB B1(120 kHz) 9 dB B4 (120 kHz) 1.2 dB A1/B1 (120 kHz) 9 dB A2/B2 (120 kHz)6 dB A3/B3 (120 kHz) 4.2 dB C0 (120 kHz) 12 dB C2 (120 kHz) 6 dB

Another possible correspondence between random access preamble formatsand random access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 10.

TABLE 10 Correspondence Table of Random Access Preamble Format andDELTA_PREAMBLE Random Access Preamble Format DELTA_PREAMBLE 0 0 dB 1 −3dB 2 −6 dB 3 0 dB A1 (15 kHz) 11 dB A2 (15 kHz) 11 dB A3 (15 kHz) 11 dBB1 (15 kHz) 11 dB B4 (15 kHz) 11 dB A1/B1 (15 kHz) 11 dB A2/B2 (15 kHz)11 dB A3/B3 (15 kHz) 11 dB C0 (15 kHz) 11 dB C2 (15 kHz) 11 dB A1 (30kHz) 14 dB A2 (30 kHz) 14 dB A3 (30 kHz) 14 dB B1 (30 kHz) 14 dB B4 (30kHz) 14 dB A1/B1 (30 kHz) 14 dB A2/B2 (30 kHz) 14 dB A3/B3 (30 kHz) 14dB C0 (30 kHz) 14 dB C2 (30 kHz) 14 dB A1 (60 kHz) 17 dB A2 (60 kHz) 17dB A3 (60 kHz) 17 dB B1 (60 kHz) 17 dB B4 (60 kHz) 17 dB A1/B1 (60 kHz)17 dB A2/B2 (60 kHz) 17 dB A3/B3 (60 kHz) 17 dB C0 (60 kHz) 17 dB C2 (60kHz) 17 dB A1 (120 kHz) 20 dB A2 (120 kHz) 20 dB A3 (120 kHz) 20 dB B1(120 kHz) 20 dB B4 (120 kHz) 20 dB A1/B1 (120 kHz) 20 dB A2/B2 (120 kHz)20 dB A3/B3 (120 kHz) 20 dB C0 (120 kHz) 20 dB C2 (120 kHz) 20 dB

Another possible correspondence between random access preamble formatsand random access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 11.

TABLE 11 Correspondence Table of Random Access Preamble Format andDELTA_PREAMBLE Random Access Preamble Format DELTA_PREAMBLE 0 0 dB 1 −3dB 2 −6 dB 3 0 dB A1 (15 kHz) 10.8 dB A2 (15 kHz) 10.8 dB A3 (15 kHz)10.8 dB B1 (15 kHz) 10.8 dB B4 (15 kHz) 10.8 dB A1/B1 (15 kHz) 10.8 dBA2/B2 (15 kHz) 10.8 dB A3/B3 (15 kHz) 10.8 dB C0 (15 kHz) 10.8 dB C2 (15kHz) 10.8 dB A1 (30 kHz) 13.8 dB A2 (30 kHz) 13.8 dB A3 (30 kHz) 13.8 dBB1 (30 kHz) 13.8 dB B4 (30 kHz) 13.8 dB A1/B1 (30 kHz) 13.8 dB A2/B2 (30kHz) 13.8 dB A3/B3 (30 kHz) 13.8 dB C0 (30 kHz) 13.8 dB C2 (30 kHz) 13.8dB A1 (60 kHz) 16.8 dB A2 (60 kHz) 16.8 dB A3 (60 kHz) 16.8 dB B1 (60kHz) 16.8 dB B4 (60 kHz) 16.8 dB A1/B1 (60 kHz) 16.8 dB A2/B2 (60 kHz)16.8 dB A3/B3 (60 kHz) 16.8 dB C0 (60 kHz) 16.8 dB C2 (60 kHz) 16.8 dBA1 (120 kHz) 19.8 dB A2 (120 kHz) 19.8 dB A3 (120 kHz) 19.8 dB B1 (120kHz) 19.8 dB B4 (120 kHz) 19.8 dB A1/B1 (120 kHz) 19.8 dB A2/B2 (120kHz) 19.8 dB A3/B3 (120 kHz) 19.8 dB C0 (120 kHz) 19.8 dB C2 (120 kHz)19.8 dB

Another possible correspondence between random access preamble formatsand random access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 12.

TABLE 12 Correspondence Table of Random Access Preamble Format andDELTA_PREAMBLE Random Access Preamble Format DELTA_PREAMBLE 0 0 dB 1 −3dB 2 −6 dB 3 0 dB A1 (15 kHz) 0 dB A2 (15 kHz) 0 dB A3 (15 kHz) 0 dB B1(15 kHz) 0 dB B4 (15 kHz) 0 dB A1/B1 (15 kHz) 0 dB A2/B2 (15 kHz) 0 dBA3/B3 (15 kHz) 0 dB C0 (15 kHz) 0 dB C2 (15 kHz) 0 dB A1 (30 kHz) 3 dBA2 (30 kHz) 3 dB A3 (30 kHz) 3 dB B1 (30 kHz) 3 dB B4 (30 kHz) 3 dBA1/B1 (30 kHz) 3 dB A2/B2 (30 kHz) 3 dB A3/B3 (30 kHz) 3 dB C0 (30 kHz)3 dB C2 (30 kHz) 3 dB A1 (60 kHz) 6 dB A2 (60 kHz) 6 dB A3 (60 kHz) 6 dBB1 (60 kHz) 6 dB B4 (60 kHz) 6 dB A1/B1 (60 kHz) 6 dB A2/B2 (60 kHz) 6dB A3/B3 (60 kHz) 6 dB C0 (60 kHz) 6 dB C2 (60 kHz) 6 dB A1 (120 kHz) 9dB A2 (120 kHz) 9 dB A3 (120 kHz) 9 dB B1 (120 kHz) 9 dB B4 (120 kHz) 9dB A1/B1 (120 kHz) 9 dB A2/B2 (120 kHz) 9 dB A3/B3 (120 kHz) 9 dB C0(120 kHz) 9 dB C2 (120 kHz) 9 dB

Another possible correspondence between random access preamble formatsand random access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 13.

TABLE 13 Correspondence Table of Random Access Preamble Format andDELTA_PREAMBLE Random Access Preamble Format DELTA_PREAMBLE 0 0 dB 1 −3dB 2 −6 dB 3 6 dB A1 (15 kHz) 11 dB A2 (15 kHz) 8 dB A3 (15 kHz) 6 dB B1(15 kHz) 11 dB B4 (15 kHz) 3 dB A1/B1 (15 kHz) 11 dB A2/B2 (15 kHz) 8 dBA3/B3 (15 kHz) 6 dB C0 (15 kHz) 14 dB C2 (15 kHz) 8 dB A1 (30 kHz) 17 dBA2 (30 kHz) 14 dB A3 (30 kHz) 12 dB B1 (30 kHz) 17 dB B4 (30 kHz) 9 dBA1/B1 (30 kHz) 17 dB A2/B2 (30 kHz) 14 dB A3/B3 (30 kHz) 12 dB C0 (30kHz) 20 dB C2 (30 kHz) 14 dB A1 (60 kHz) 23 dB A2 (60 kHz) 20 dB A3 (60kHz) 18 dB B1 (60 kHz) 23 dB B4 (60 kHz) 15 dB A1/B1 (60 kHz) 23 dBA2/B2 (60 kHz) 20 dB A3/B3 (60 kHz) 18 dB C0 (60 kHz) 26 dB C2 (60 kHz)20 dB A1 (120 kHz) 29 dB A2 (120 kHz) 26 dB A3 (120 kHz) 24 dB B1 (120kHz) 29 dB B4 (120 kHz) 21 dB A1/B1 (120 kHz) 29 dB A2/B2 (120 kHz) 26dB A3/B3 (120 kHz) 24 dB C0 (120 kHz) 29 dB C2 (120 kHz) 23 dB

Another possible correspondence between random access preamble formats,random access preamble subcarrier spacing indication information andrandom access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 14.

TABLE 14 Correspondence Table of Random Access Preamble Format, randomaccess preamble subcarrier spacing indication information(prach-Msg1SubcarrierSpacing, Msg1SCS for short) and DELTA_PREAMBLERandom DELTA_PREAMBLE Access Carrier Range <6 GHz Carrier Range >6 GHzPreamble Msg1SCS = Msg1SCS = Msg1SCS = Msg1SCS = Format 0 1 0 1 0 0 dB 1−3 dB  2 −6 dB  3 0 dB A1 8 dB 11 dB 14 dB 17 dB A2 5 dB 8 dB 11 dB 14dB A3 3 dB 6 dB 9 dB 12 dB B1 8 dB 11 dB 14 dB 17 dB B4 0 dB 3 dB 6 dB 9 dB A1/B1 8 dB 11 dB 14 dB 17 dB A2/B2 5 dB 8 dB 11 dB 14 dB A3/B3 3dB 6 dB 9 dB 12 dB C0 11 dB  14 dB 17 dB 20 dB C2 5 dB 8 dB 11 dB 14 dB

It should be noted that a possible correspondence between random accesspreamble formats, random access preamble subcarrier spacing indicationinformation, and preamble transmit power offsets DELTA_PREAMBLE may begiven by swapping some of columns in Table 14, as shown in Table 15.

TABLE 15 Correspondence Table of Random Access Preamble Format, Msg1SCSand DELTA_PREAMBLE Random DELTA_PREAMBLE Access Carrier Range <6 GHzCarrier Range >6 GHz Preamble Msg1SCS = Msg1SCS = Msg1SCS = Msg1SCS =Format 0 1 0 1 0 0 dB 1 −3 dB  2 −6 dB  3 0 dB A1 11 dB 8 dB 17 dB 14 dBA2 8 dB 5 dB 14 dB 11 dB A3 6 dB 3 dB 12 dB 9 dB B1 11 dB 8 dB 17 dB 14dB B4 3 dB 0 dB  9 dB 6 dB A1/B1 11 dB 8 dB 17 dB 14 dB A2/B2 8 dB 5 dB14 dB 11 dB A3/B3 6 dB 3 dB 12 dB 9 dB C0 14 dB 11 dB  20 dB 17 dB C2 8dB 5 dB 14 dB 11 dB

It should be noted that possible correspondences between random accesspreamble formats, random access preamble subcarrier spacing indicationinformation, and preamble transmit power offsets DELTA_PREAMBLE may begiven by dividing each of Table 14 and Table 15 into two sub-tablesbased on the carrier ranges, as shown in Tables 16 and 17 (in whichTable 16-1 and Table 16-2 are sub-tables of Table 16, and Table 17-1 andTable 17-2 are sub-tables of Table 17).

TABLE 16-1 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range <6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 0 0 dB 1 −3 dB  2−6 dB  3 0 dB A1 8 dB 11 dB A2 5 dB 8 dB A3 3 dB 6 dB B1 8 dB 11 dB B4 0dB 3 dB A1/B1 8 dB 11 dB A2/B2 5 dB 8 dB A3/B3 3 dB 6 dB C0 11 dB  14 dBC2 5 dB 8 dB

TABLE 16-2 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range >6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 A1 14 dB 17 dB A211 dB 14 dB A3 9 dB 12 dB B1 14 dB 17 dB B4 6 dB  9 dB A1/B1 14 dB 17 dBA2/B2 11 dB 14 dB A3/B3 9 dB 12 dB C0 17 dB 20 dB C2 11 dB 14 dB

TABLE 17-1 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range <6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 0 0 dB 1 −3 dB  2−6 dB  3 0 dB A1 11 dB 8 dB A2 8 dB 5 dB A3 6 dB 3 dB B1 11 dB 8 dB B4 3dB 0 dB A1/B1 11 dB 8 dB A2/B2 8 dB 5 dB A3/B3 6 dB 3 dB C0 14 dB 11 dB C2 8 dB 5 dB

TABLE 17-2 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range >6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 A1 17 dB 14 dB A214 dB 11 dB A3 12 dB 9 dB B1 17 dB 14 dB B4  9 dB 6 dB A1/B1 17 dB 14 dBA2/B2 14 dB 11 dB A3/B3 12 dB 9 dB C0 20 dB 17 dB C2 14 dB 11 dB

Another possible correspondence between random access preamble formats,random access preamble subcarrier spacing indication information, andrandom access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 18.

TABLE 18 Correspondence Table of Random Access Preamble Format, Msg1SCSand DELTA_PREAMBLE Random DELTA_PREAMBLE Access Carrier Range <6 GHzCarrier Range >6 GHz Preamble Msg1SCS = Msg1SCS = Msg1SCS = Msg1SCS =Format 0 1 0 1 0 0 dB 1 −3 dB  2 −6 dB  3 0 dB A1 7.8 dB 10.8 dB 13.8 dB16.8 dB A2 4.8 dB 7.8 dB 10.8 dB 13.8 dB A3 3 dB 6 dB 9 dB 12 dB B1 7.8dB 10.8 dB 13.8 dB 16.8 dB B4 0 dB 3 dB 6 dB 9 dB A1/B1 7.8 dB 10.8 dB13.8 dB 16.8 dB A2/B2 4.8 dB 7.8 dB 10.8 dB 13.8 dB A3/B3 3 dB 6 dB 9 dB12 dB C0 10.8 dB 13.8 dB 16.8 dB 19.8 dB C2 4.8 dB 7.8 dB 10.8 dB 13.8dB

It should be noted that a possible correspondence between random accesspreamble formats, random access preamble subcarrier spacing indicationinformation, and preamble transmit power offsets DELTA_PREAMBLE may begiven by swapping some of columns in Table 18, as shown in Table 19.

TABLE 19 Correspondence Table of Random Access Preamble Format, Msg1SCSand DELTA_PREAMBLE Random DELTA_PREAMBLE Access Carrier Range <6 GHzCarrier Range >6 GHz Preamble Msg1SCS = Msg1SCS = Msg1SCS = Msg1SCS =Format 0 1 0 1 0 0 dB 1 −3 dB  2 −6 dB  3 0 dB A1 10.8 dB 7.8 dB 16.8 dB13.8 dB A2 7.8 dB 4.8 dB 13.8 dB 10.8 dB A3 6 dB 3 dB 12 dB 9 dB B1 10.8dB 7.8 dB 16.8 dB 13.8 dB B4 3 dB 0 dB 9 dB 6 dB A1/B1 10.8 dB 7.8 dB16.8 dB 13.8 dB A2/B2 7.8 dB 4.8 dB 13.8 dB 10.8 dB A3/B3 6 dB 3 dB 12dB 9 dB C0 13.8 dB 10.8 dB 19.8 dB 16.8 dB C2 7.8 dB 4.8 dB 13.8 dB 10.8dB

It should be noted that possible correspondences between random accesspreamble formats, random access preamble subcarrier spacing indicationinformation, and preamble transmit power offsets DELTA_PREAMBLE may begiven by dividing each of Table 18 and Table 19 into two sub-tablesbased on the carrier ranges, as shown in Tables 17 and 18 (in whichTable 20-1 and Table 20-2 are sub-tables of Table 20, and Table 21-1 andTable 21-2 are sub-tables of Table 21).

TABLE 20-1 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range <6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 0 0 dB 1 −3 dB  2−6 dB  3 0 dB A1 7.8 dB 10.8 dB A2 4.8 dB 7.8 dB A3 3 dB 6 dB B1 7.8 dB10.8 dB B4 0 dB 3 dB A1/B1 7.8 dB 10.8 dB A2/B2 4.8 dB 7.8 dB A3/B3 3 dB6 dB C0 10.8 dB 13.8 dB C2 4.8 dB 7.8 dB

TABLE 20-2 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE DELTA_PREAMBLE (Carrier Range > 6 GHz) RandomAccess Preamble Format Msg1SCS = 0 Msg1SCS = 1 A1 13.8 dB 16.8 dB A210.8 dB 13.8 dB A3 9 dB 12 dB B1 13.8 dB 16.8 dB B4 6 dB 9 dB A1/B1 13.8dB 16.8 dB A2/B2 10.8 dB 13.8 dB A3/B3 9 dB 12 dB C0 16.8 dB 19.8 dB C210.8 dB 13.8 dB

TABLE 21-1 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range < 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 0  0 dB 1 −3 dB 2−6 dB 3  0 dB A1 10.8 dB 7.8 dB A2 7.8 dB 4.8 dB A3 6 dB 3 dB B1 10.8 dB7.8 dB B4 3 dB 0 dB A1/B1 10.8 dB 7.8 dB A2/B2 7.8 dB 4.8 dB A3/B3 6 dB3 dB C0 13.8 dB 10.8 dB C2 7.8 dB 4.8 dB

TABLE 21-2 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range > 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 A1 16.8 dB 13.8dB A2 13.8 dB 10.8 dB A3 12 dB 9 dB B1 16.8 dB 13.8 dB B4 9 dB 6 dBA1/B1 16.8 dB 13.8 dB A2/B2 13.8 dB 10.8 dB A3/B3 12 dB 9 dB C0 19.8 dB16.8 dB C2 13.8 dB 10.8 dB

Another possible correspondence between random access preamble formats,random access preamble subcarrier spacing indication information andrandom access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 22.

TABLE 22 Correspondence Table of Random Access Preamble Format, Msg1SCSand DELTA_PREAMBLE Random DELTA_PREAMBLE Access Carrier Range < 6 GHzCarrier Range > 6 GHz Preamble Msg1SCS = Msg1SCS = Msg1SCS = Msg1SCS =Format 0 1 0 1 0  0 dB 1 −3 dB 2 −6 dB 3  0 dB A1 0 dB 3 dB 6 dB 9 dB A2−3 dB 0 dB 3 dB 6 dB A3 −5 dB −2 dB 1 dB 4 dB B1 0 dB 3 dB 6 dB 9 dB B4−8 dB −5 dB −2 dB 1 dB A1/B1 0 dB 3 dB 6 dB 9 dB A2/B2 −3 dB 0 dB 3 dB 6dB A3/B3 −5 dB −2 dB 1 dB 4 dB C0 3 dB 6 dB 9 dB 12 dB C2 −3 dB 0 dB 3dB 6 dB

It should be noted that a possible correspondence between random accesspreamble formats, random access preamble subcarrier spacing indicationinformation, and preamble transmit power offsets DELTA_PREAMBLE may begiven, by swapping some of columns in Table 22, as shown in Table 23.

TABLE 23 Correspondence Table of Random Access Preamble Format, Msg1SCSand DELTA_PREAMBLE Random DELTA_PREAMBLE Access Carrier Range < 6 GHzCarrier Range > 6 GHz Preamble Msg1SCS = Msg1SCS = Msg1SCS = Msg1SCS =Format 0 1 0 1 0  0 dB 1 −3 dB 2 −6 dB 3  0 dB A1 3 dB 0 dB 9 dB 6 dB A20 dB −3 dB 6 dB 3 dB A3 −2 dB −5 dB 4 dB 1 dB B1 3 dB 0 dB 9 dB 6 dB B4−5 dB −8 dB 1 dB −2 dB A1/B1 3 dB 0 dB 9 dB 6 dB A2/B2 0 dB −3 dB 6 dB 3dB A3/B3 −2 dB −5 dB 4 dB 1 dB C0 6 dB 3 dB 12 dB 9 dB C2 0 dB −3 dB 6dB 3 dB

It should be noted that possible correspondences between random accesspreamble formats, random access preamble subcarrier spacing indicationinformation, and preamble transmit power offsets DELTA_PREAMBLE may begiven by dividing each of Table 22 and Table 23 into two sub-tablesbased on the carrier ranges, as shown in Tables 24 and 25 (in whichTable 24-1 and Table 24-2 are sub-tables of Table 24, and Table 25-1 andTable 25-2 are sub-tables of Table 25).

TABLE 24-1 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range < 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 0  0 dB 1 −3 dB 2−6 dB 3  0 dB A1 0 dB 3 dB A2 −3 dB 0 dB A3 −5 dB −2 dB B1 0 dB 3 dB B4−8 dB −5 dB A1/B1 0 dB 3 dB A2/B2 −3 dB 0 dB A3/B3 −5 dB −2 dB C0 3 dB 6dB C2 −3 dB 0 dB

TABLE 24-2 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range > 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 A1 6 dB 9 dB A2 3dB 6 dB A3 1 dB 4 dB B1 6 dB 9 dB B4 −2 dB  1 dB A1/B1 6 dB 9 dB A2/B2 3dB 6 dB A3/B3 1 dB 4 dB C0 9 dB 12 dB  C2 3 dB 6 dB

TABLE 25-1 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range < 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 0  0 dB 1 −3 dB 2−6 dB 3  0 dB A1 3 dB 0 dB A2 0 dB −3 dB A3 −2 dB −5 dB B1 3 dB 0 dB B4−5 dB −8 dB A1/B1 3 dB 0 dB A2/B2 0 dB −3 dB A3/B3 −2 dB −5 dB C0 6 dB 3dB C2 0 dB −3 dB

TABLE 25-2 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range > 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 A1 9 dB 6 dB A2 6dB 3 dB A3 4 dB 1 dB B1 9 dB 6 dB B4 1 dB −2 dB  A1/B1 9 dB 6 dB A2/B2 6dB 3 dB A3/B3 4 dB 1 dB C0 12 dB  9 dB C2 6 dB 3 dB

Another possible correspondence between random access preamble formats,random access preamble subcarrier spacing indication information, andrandom access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 26.

TABLE 26 Correspondence Table of Random Access Preamble Format, Msg1SCSand DELTA_PREAMBLE Random DELTA_PREAMBLE Access Carrier Range < 6 GHzCarrier Range > 6 GHz Preamble Msg1SCS = Msg1SCS = Msg1SCS = Msg1SCS =Format 0 1 0 1 0  0 dB 1 −3 dB 2 −6 dB 3  0 dB A1 0 dB 3 dB 6 dB 9 dB A2−3 dB 0 dB 3 dB 6 dB A3 −4.8 dB −1.8 dB 1.2 dB 4.2 dB B1 0 dB 3 dB 6 dB9 dB B4 −7.8 dB −4.8 dB −1.8 dB 1.2 dB A1/B1 0 dB 3 dB 6 dB 9 dB A2/B2−3 dB 0 dB 3 dB 6 dB A3/B3 −4.8 dB −1.8 dB 1.2 dB 4.2 dB C0 3 dB 6 dB 9dB 12 dB C2 −3 dB 0 dB 3 dB 6 dB

It should be noted that a possible correspondence between random accesspreamble formats, random access preamble subcarrier spacing indicationinformation, and preamble transmit power offsets DELTA_PREAMBLE may begiven by swapping some of columns in Table 26, as shown in Table 27.

TABLE 27 Correspondence Table of Random Access Preamble Format, Msg1SCSand DELTA_PREAMBLE Random DELTA_PREAMBLE Access Carrier Range < 6 GHzCarrier Range > 6 GHz Preamble Msg1SCS = Msg1SCS = Msg1SCS = Msg1SCS =Format 0 1 0 1 0  0 dB 1 −3 dB 2 −6 dB 3  0 dB A1 3 dB 0 dB 9 dB 6 dB A20 dB −3 dB 6 dB 3 dB A3 −1.8 dB −4.8 dB 4.2 dB 1.2 dB B1 3 dB 0 dB 9 dB6 dB B4 −4.8 dB −7.8 dB 1.2 dB −1.8 dB A1/B1 3 dB 0 dB 9 dB 6 dB A2/B2 0dB −3 dB 6 dB 3 dB A3/B3 −1.8 dB −4.8 dB 4.2 dB 1.2 dB C0 6 dB 3 dB 12dB 9 dB C2 0 dB −3 dB 6 dB 3 dB

It should be noted that possible correspondences between random accesspreamble formats, random access preamble subcarrier spacing indicationinformation, and preamble transmit power offsets DELTA_PREAMBLE may begiven by dividing each of Table 26 and Table 27 into two sub-tablesbased on the carrier ranges, as shown in Tables 28 and 29 (in whichTable 28-1 and Table 28-2 are sub-tables of Table 28, and Table 29-1 andTable 29-2 are sub-tables of Table 29).

TABLE 28-1 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE DELTA_PREAMBLE (Carrier Range < 6 GHz) RandomAccess Preamble Format Msg1SCS = 0 Msg1SCS = 1 0  0 dB 1 −3 dB 2 −6 dB 3 0 dB A1 0 dB 3 dB A2 −3 dB 0 dB A3 −4.8 dB −1.8 dB B1 0 dB 3 dB B4 −7.8dB −4.8 dB A1/B1 0 dB 3 dB A2/B2 −3 dB 0 dB A3/B3 −4.8 dB −1.8 dB C0 3dB 6 dB C2 −3 dB 0 dB

TABLE 28-2 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range > 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 A1 6 dB 9 dB A2 3dB 6 dB A3 1.2 dB 4.2 dB B1 6 dB 9 dB B4 −1.8 dB 1.2 dB A1/B1 6 dB 9 dBA2/B2 3 dB 6 dB A3/B3 1.2 dB 4.2 dB C0 9 dB 12 dB C2 3 dB 6 dB

TABLE 29-1 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range < 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 0  0 dB 1 −3 dB 2−6 dB 3  0 dB A1 3 dB 0 dB A2 0 dB −3 dB A3 −1.8 dB −4.8 dB B1 3 dB 0 dBB4 −4.8 dB −7.8 dB A1/B1 3 dB 0 dB A2/B2 0 dB −3 dB A3/B3 −1.8 dB −4.8dB C0 6 dB 3 dB C2 0 dB −3 dB

TABLE 29-2 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range > 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 A1 9 dB 6 dB A2 6dB 3 dB A3 4.2 dB 1.2 dB B1 9 dB 6 dB B4 1.2 dB −1.8 dB A1/B1 9 dB 6 dBA2/B2 6 dB 3 dB A3/B3 4.2 dB 1.2 dB C0 12 dB 9 dB C2 6 dB 3 dB

Another possible correspondence between random access preamble formats,random access preamble subcarrier spacing indication information andrandom access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 30.

TABLE 30 Correspondence Table of Random Access Preamble Format, Msg1SCSand DELTA_PREAMBLE Random DELTA_PREAMBLE Access Carrier Range < 6 GHzCarrier Range > 6 GHz Preamble Msg1SCS = Msg1SCS = Msg1SCS = Msg1SCS =Format 0 1 0 1 0  0 dB 1 −3 dB 2 −6 dB 3  0 dB A1 11 dB 14 dB 17 dB 20dB A2 A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

It should be noted that a possible correspondence between random accesspreamble formats, random access preamble subcarrier spacing indicationinformation, and preamble transmit power offsets DELTA_PREAMBLE may begiven by swapping some of columns in Table 30, as shown in Table 31.

TABLE 31 Correspondence Table of Random Access Preamble Format, Msg1SCSand DELTA_PREAMBLE Random DELTA_PREAMBLE Access Carrier Range < 6 GHzCarrier Range > 6 GHz Preamble Msg1SCS = Msg1SCS = Msg1SCS = Msg1SCS =Format 0 1 0 1 0  0 dB 1 −3 dB 2 −6 dB 3  0 dB A1 14 dB 11 dB 20 dB 17dB A2 A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

It should be noted that possible correspondences between random accesspreamble formats, random access preamble subcarrier spacing indicationinformation, and preamble transmit power offsets DELTA_PREAMBLE may begiven by dividing each of Table 30 and Table 31 into two sub-tablesbased on the carrier ranges, as shown in Tables 32 and 33 (in whichTable 32-1 and Table 32-2 are sub-tables of Table 32, and Table 33-1 andTable 33-2 are sub-tables of Table 33).

TABLE 32-1 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range < 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 0  0 dB 1 −3 dB 2−6 dB 3  0 dB A1 11 dB 14 dB A2 A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

TABLE 32-2 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range > 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 A1 17 dB 20 dB A2A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

TABLE 33-1 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range < 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 0  0 dB 1 −3 dB 2−6 dB 3  0 dB A1 14 dB 11 dB A2 A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

TABLE 33-2 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range > 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 A1 20 dB 17 dB A2A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

Another possible correspondence between random access preamble formats,random access preamble subcarrier spacing indication information andrandom access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 34.

TABLE 34 Correspondence Table of Random Access Preamble Format, Msg1SCSand DELTA_PREAMBLE Random DELTA_PREAMBLE Access Carrier Range < 6 GHzCarrier Range > 6 GHz Preamble Msg1SCS = Msg1SCS = Msg1SCS = Msg1SCS =Format 0 1 0 1 0  0 dB 1 −3 dB 2 −6 dB 3  0 dB A1 A2 A3 10.8 dB 13.8 dB16.8 dB 19.8 dB B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

It should be noted that a possible correspondence between random accesspreamble formats, random access preamble subcarrier spacing indicationinformation, and preamble transmit power offsets DELTA_PREAMBLE may begiven by swapping some of columns in Table 34, as shown in Table 35.

TABLE 35 Correspondence Table of Random Access Preamble Format, Msg1SCSand DELTA_PREAMBLE Random DELTA_PREAMBLE Access Carrier Range < 6 GHzCarrier Range > 6 GHz Preamble Msg1SCS = Msg1SCS = Msg1SCS = Msg1SCS =Format 0 1 0 1 0  0 dB 1 −3 dB 2 −6 dB 3  0 dB A1 13.8 dB 10.8 dB 19.8dB 16.8 dB A2 A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

It should be noted that possible correspondences between random accesspreamble formats, random access preamble subcarrier spacing indicationinformation, and preamble transmit power offsets DELTA_PREAMBLE may begiven by dividing each of Table 34 and Table 35 into two sub-tablesbased on the carrier ranges, as shown in Tables 36 and 37 (in whichTable 36-1 and Table 36-2 are sub-tables of Table 36, and Table 37-1 andTable 37-2 are sub-tables of Table 37).

TABLE 36-1 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range < 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 0  0 dB 1 −3 dB 2−6 dB 3  0 dB A1 10.8 dB 13.8 dB A2 A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

TABLE 36-2 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range > 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 A1 16.8 dB 19.8dB A2 A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

TABLE 37-1 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range < 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 0  0 dB 1 −3 dB 2−6 dB 3  0 dB A1 13.8 dB 10.8 dB A2 A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

TABLE 37-2 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range > 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 A1 19.8 dB 16.8dB A2 A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

Another possible correspondence between random access preamble formats,random access preamble subcarrier spacing indication information, andrandom access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 38.

TABLE 38 Correspondence Table of Random Access Preamble Format, Msg1SCSand DELTA_PREAMBLE Random DELTA_PREAMBLE Access Carrier Range < 6 GHzCarrier Range > 6 GHz Preamble Msg1SCS = Msg1SCS = Msg1SCS = Msg1SCS =Format 0 1 0 1 0  0 dB 1 −3 dB 2 −6 dB 3  0 dB A1 0 dB 3 dB 6 dB 9 dB A2A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

It should be noted that a possible correspondence between random accesspreamble formats, random access preamble subcarrier spacing indicationinformation, and preamble transmit power offsets DELTA_PREAMBLE may begiven by swapping some of columns in Table 38, as shown in Table 39.

TABLE 39 Correspondence Table of Random Access Preamble Format, Msg1SCSand DELTA_PREAMBLE Random DELTA_PREAMBLE Access Carrier Range < 6 GHzCarrier Range > 6 GHz Preamble Msg1SCS = Msg1SCS = Msg1SCS = Msg1SCS =Format 0 1 0 1 0  0 dB 1 −3 dB 2 −6 dB 3  0 dB A1 3 dB 0 dB 9 dB 6 dB A2A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

It should be noted that possible correspondences between random accesspreamble formats, random access preamble subcarrier spacing indicationinformation, and preamble transmit power offsets DELTA_PREAMBLE may begiven by dividing each of Table 38 and Table 39 into two sub-tablesbased on the carrier ranges as shown in Tables 40 and 41 (in which Table40-1 and Table 40-2 are sub-tables of Table 40, and Table 41-1 and Table41-2 are sub-tables of Table 41).

TABLE 40-1 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range < 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 0  0 dB 1 −3 dB 2−6 dB 3  0 dB A1 0 dB 3 dB A2 A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

TABLE 40-2 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range > 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 A1 6 dB 9 dB A2A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

TABLE 41-1 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range < 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 0  0 dB 1 −3 dB 2−6 dB 3  0 dB A1 3 dB 0 dB A2 A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

TABLE 41-2 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range > 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 A1 9 dB 6 dB A2A3 B1 B4 A1/B1 A2/B2 A3/B3 C0 C2

Another possible correspondence between random access preamble formats,random access preamble subcarrier spacing indication information andrandom access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 42.

TABLE 42 Correspondence Table of Random Access Preamble Format, Msg1SCSand DELTA_PREAMBLE Random Access DELTA_PREAMBLE Preamble Carrier Range <6 GHz Carrier Range > 6 GHz Format Msg1SCS = 0 Msg1SCS = 1 Msg1SCS = 0Msg1SCS = 1 0  0 dB 1 −3 dB 2 −6 dB 3  6 dB A1 11 dB  17 dB 23 dB 29 dBA2 8 dB 14 dB 20 dB 26 dB A3 6 dB 12 dB 18 dB 24 dB B1 11 dB  17 dB 23dB 29 dB B4 3 dB  9 dB 15 dB 21 dB A1/B1 11 dB  17 dB 23 dB 29 dB A2/B28 dB 14 dB 20 dB 26 dB A3/B3 6 dB 12 dB 18 dB 24 dB C0 14 dB  20 dB 26dB 29 dB C2 8 dB 14 dB 20 dB 23 dB

It should be noted that a possible correspondence between random accesspreamble formats, random access preamble subcarrier spacing indicationinformation, and preamble transmit power offsets DELTA_PREAMBLE may begiven by swapping some of columns in Table 42, as shown in Table 43.

TABLE 43 Correspondence Table of Random Access Preamble Format, Msg1SCSand DELTA_PREAMBLE Random Access DELTA_PREAMBLE Preamble Carrier Range <6 GHz Carrier Range > 6 GHz Format Msg1SCS = 0 Msg1SCS = 1 Msg1SCS = 0Msg1SCS = 1 0  0 dB 1 −3 dB 2 −6 dB 3  6 dB A1 17 dB 11 dB  29 dB 23 dBA2 14 dB 8 dB 26 dB 20 dB A3 12 dB 6 dB 24 dB 18 dB B1 17 dB 11 dB  29dB 23 dB B4  9 dB 3 dB 21 dB 15 dB A1/B1 17 dB 11 dB  29 dB 23 dB A2/B214 dB 8 dB 26 dB 20 dB A3/B3 12 dB 6 dB 24 dB 18 dB C0 20 dB 14 dB  29dB 26 dB C2 14 dB 8 dB 23 dB 20 dB

It should be noted that possible correspondences between random accesspreamble formats, random access preamble subcarrier spacing indicationinformation, and preamble transmit power offsets DELTA_PREAMBLE may begiven by dividing each of Table 42 and Table 43 into two sub-tablesbased on the carrier ranges, as shown in Tables 44 and 45 (in whichTable 44-1 and Table 44-2 are sub-tables of Table 44, and Table 45-1 andTable 45-2 are sub-tables of Table 45).

TABLE 44-1 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range < 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 0  0 dB 1 −3 dB 2−6 dB 3  6 dB A1 11 dB  17 dB A2 8 dB 14 dB A3 6 dB 12 dB B1 11 dB  17dB B4 3 dB  9 dB A1/B1 11 dB  17 dB A2/B2 8 dB 14 dB A3/B3 6 dB 12 dB C014 dB  20 dB C2 8 dB 14 dB

TABLE 44-2 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range > 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 A1 23 dB 29 dB A220 dB 26 dB A3 18 dB 24 dB B1 23 dB 29 dB B4 15 dB 21 dB A1/B1 23 dB 29dB A2/B2 20 dB 26 dB A3/B3 18 dB 24 dB C0 26 dB 29 dB C2 20 dB 23 dB

TABLE 45-1 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range < 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 0  0 dB 1 −3 dB 2−6 dB 3  6 dB A1 17 dB 11 dB  A2 14 dB 8 dB A3 12 dB 6 dB B1 17 dB 11dB  B4  9 dB 3 dB A1/B1 17 dB 11 dB  A2/B2 14 dB 8 dB A3/B3 12 dB 6 dBC0 20 dB 14 dB  C2 14 dB 8 dB

TABLE 45-2 Correspondence Table of Random Access Preamble Format,Msg1SCS and DELTA_PREAMBLE Random Access Preamble DELTA_PREAMBLE(Carrier Range > 6 GHz) Format Msg1SCS = 0 Msg1SCS = 1 A1 29 dB 23 dB A226 dB 20 dB A3 24 dB 18 dB Bl 29 dB 23 dB B4 21 dB 15 dB A1/B1 29 dB 23dB A2/B2 26 dB 20 dB A3/B3 24 dB 18 dB C0 29 dB 26 dB C2 23 dB 20 dB

Another possible correspondence between random access preamble formatsrandom access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 46.

TABLE 46 Correspondence Table of Random Access Preamble Format andDELTA_PREAMBLE Random Access Preamble Format DELTA_PREAMBLE 0  0 dB 1 −3dB 2 −6 dB 3  0 dB A1 8 + 3 · μ dB A2 5 + 3 · μ dB A3 3 + 3 · μ dB B18 + 3 · μ dB B4    3 · μ dB A1/B1 8 + 3 · μ dB A2/B2 5 + 3 · μ dB A3/B33 + 3 · μ dB C0 11 + 3 · μ dB  C2 5 + 3 · μ dB

In Table 46, μ is a parameter indicating a random access preamblesubcarrier spacing (an indication value being 15·2^(μ) kHz), and may be0, 1, 2, 3. The random access preamble subcarrier spacing is 15 kHz whenμ=0; the random access preamble subcarrier spacing is 30 kHz when μ=1;the random access preamble subcarrier spacing is 60 kHz when μ=2; andthe random access preamble subcarrier spacing is 120 kHz when μ=3.

It should be noted that a possible correspondence between random accesspreamble formats and preamble transmit power offsets DELTA_PREAMBLE maybe given by dividing Table 46 into two sub-tables based on the randomaccess preambles as shown in Table 47 (in which Table 47-1 and Table47-2 are sub-tables of Table 47).

TABLE 47-1 Correspondence Table of Random Access Preamble Format andDELTA_PREAMBLE Random Access Preamble Format DELTA_PREAMBLE 0  0 dB 1 −3dB 2 −6 dB 3  0 dB

TABLE 47-2 Correspondence Table of Random Access Preamble Format andDELTA_PREAMBLE Random Access Preamble Format DELTA_PREAMBLE A1 8 + 3 · μdB A2 5 + 3 · μ dB A3 3 + 3 · μ dB B1 8 + 3 · μ dB B4    3 · μ dB A1/B18 + 3 · μ dB A2/B2 5 + 3 · μ dB A3/B3 3 + 3 · μ dB C0 11 + 3 · μ dB  C25 + 3 · μ dB

In Table 47, μ is a parameter indicating a random access preamblesubcarrier spacing (an indication value being 15·2^(μ) kHz), and may be0, 1, 2, 3. The random access preamble subcarrier spacing is 15 kHz whenμ=0; the random access preamble subcarrier spacing is 30 kHz when μ=1;the random access preamble subcarrier spacing is 60 kHz when μ=2; andthe random access preamble subcarrier spacing is 120 kHz when μ=3.

Another possible correspondence between random access preamble formatsand random access preamble transmit power offsets DELTA_PREAMBLE may begiven in Table 48.

TABLE 48 Correspondence Table of Random Access Preamble Format andDELTA_PREAMBLE Random Access Preamble Format DELTA_PREAMBLE 0  0 dB 1 −3dB 2 −6 dB 3  0 dB A1, B1, A1/B1 8 + 3 · μ dB A2, A2/B2 5 + 3 · μ dB A3,A3/B3 3 + 3 · μ dB B4    3 · μ dB C0 11 + 3 · μ dB  C2 5 + 3 · μ dB

In Table 48, μ is a parameter indicating a random access preamblesubcarrier spacing (an indication value being 15·2^(μ) kHz), and may be0, 1, 2, 3. The random access preamble subcarrier spacing is 15 kHz whenμ=0; the random access preamble subcarrier spacing is 30 kHz when μ=1;the random access preamble subcarrier spacing is 60 kHz when μ=2; andthe random access preamble subcarrier spacing is 120 kHz when μ=3.

It should be noted that a possible correspondence between random accesspreamble formats and preamble transmit power offsets DELTA_PREAMBLE maybe given by dividing Table 48 into two sub-tables based on the randomaccess preambles, as shown in Table 49 (in which Table 49-1 and Table49-2 are sub-tables of Table 49).

TABLE 49-1 Correspondence Table of Random Access Preamble Format andDELTA_PREAMBLE Random Access Preamble Format DELTA_PREAMBLE 0  0 dB 1 −3dB 2 −6 dB 3  0 dB

TABLE 49-2 Correspondence Table of Random Access Preamble Format andDELTA_PREAMBLE Random Access Preamble Format DELTA_PREAMBLE A1, B1,A1/B1 8 + 3 · μ dB A2, A2/B2 5 + 3 · μ dB A3, A3/B3 3 + 3 · μ dB B4    3· μ dB C0 11 + 3 · μ dB  C2 5 + 3 · μ dB

In Table 49, μ is a parameter indicating a random access preamblesubcarrier spacing (an indication value being 15·2^(μ) kHz), and may be0, 1, 2, 3. The random access preamble subcarrier spacing is 15 kHz whenμ=0; the random access preamble subcarrier spacing is 30 kHz when μ=1;the random access preamble subcarrier spacing is 60 kHz when μ=2; andthe random access preamble subcarrier spacing is 120 kHz when μ=3.

After the UE determines the random access preamble transmit power offsetDELTA_PREAMBLE as described above, the random access preamble transmitpower PREAMBLE_RECEIVED_TARGET_POWER expected to be received by the basestation may be set as:

PREAMBLE_RECEIVED_TARGET_POWER=ra-PreambleInitialReceivedTargetPowerDELTA_PREAMBLE (PREAMBLE_POWER_RAMPING_COUNTER−1)*powerRampingStep,

where ra-PreambleInitialReceivedTargetPower is an initial transmit powerconfigured by the high layer, DELTA_PREAMBLE is a random access preambletransmit power offset, PREMBLE_POWER_RAMPING_COUNTER is a power rampingcount, and powerRampingStep is a power ramping step configured by thehigh layer.

Then, the UE may determine that a final random access preamble transmitpower is min{P_(CMAXc)(i), PREAMBLE_RECEIVED_TARGET_POWER+PL_(c)}, whereP_(CMAXc)(i) is a maximum transmit power of the UE, and PL_(c) is a pathloss value.

Hereinafter, a structure of a UE according to an exemplary embodiment ofthe present disclosure will be described with reference to FIG. 24. FIG.24 schematically shows a structural block diagram of a UE 2400 accordingto an exemplary embodiment of the present disclosure. The UE 2400 may beused to perform the method 400 described with reference to FIG. 23. Forthe sake of brevity, only a schematic structure of the UE according tothe exemplary embodiment of the present disclosure will be describedherein, and the details which have been described in the method 2300with reference to FIG. 23 will thus be omitted.

As shown in FIG. 24, the UE 2400 includes a communication interface 2401for external communication, a processing unit or a processor 2403, whichmay be a single unit or a combination of multiple units for performingdifferent steps of the method; a memory 2405 storing computer-executableinstructions, which when executed by the processor 2403, cause theprocessor 2403 to: obtain random access configuration information from abase station, the random access configuration information including arandom access configuration index and random access preamble subcarrierspacing indication information; obtain a random access preamble formatbased on the random access configuration index and the random accesspreamble subcarrier spacing indication information; and determine arandom access preamble transmit power offset corresponding to theobtained random access preamble format.

In an exemplary embodiment, the UE 2400 may determine the random accesspreamble transmit power offset DELTA_PREAMBLE corresponding to theobtained random access preamble format by querying a correspondencetable including at least random access preamble formats and randomaccess preamble transmit power offsets DELTA_PREAMBLE.

In another exemplary embodiment, the correspondence table may furtherinclude at least one of the random access preamble subcarrier spacingindication information and the carrier range. In this case, the randomaccess preamble transmit power offset DELTA_PREAMBLE corresponding tothe obtained random access preamble format and at least one of therandom access preamble subcarrier spacing indication information and thecarrier range may be determined by querying the correspondence table.

As described above, the correspondence table is predefined, and may bestored in UE 2400 locally.

The novel method of determining a random access preamble transmit powerproposed in the embodiments of the present disclosure is applicable toall of preamble formats in the future wireless communication systems,and may efficiently adjust the preamble transmit power in the randomaccess process, and improve the success probability of the terminal'srandom access in a case of controlling interference, significantlyimprove the performance of the future wireless communication systems,and provide the terminal with a lower access delay and a better accessexperience.

Computer-executable instructions or programs for implementing thefunctions of various embodiments of the present disclosure may berecorded on a computer-readable storage medium. Corresponding functionscan be realized by having a computer system read programs recorded onthe recording medium and execute these programs. The so-called “computersystem” herein may be a computer system embedded in the device, and mayinclude an operating system or hardware (such as a peripheral device).The “computer-readable storage medium” may be a semiconductor recordingmedium, an optical recording medium, a magnetic recording medium, ashort-time dynamic storage program recording medium, or any otherrecording media readable by a computer.

Various features or functional modules of the devices used in the aboveembodiments may be implemented or performed by circuitry (e.g., asingle-chip or multi-chip integrated circuit). Circuits designed toperform the functions described in the present specification may includegeneral purpose processors, digital signal processors (DSPs),application specific integrated circuits (ASICs), field programmablegate arrays (FPGAs), or other programmable logic devices, discrete Gateor transistor logic, discrete hardware components, or any combination ofthe above. A general-purpose processor may be a microprocessor or anyexisting processor, controller, microcontroller, or state machine. Theabove circuit may be a digital circuit or an analog circuit. In a caseof new integrated circuit technology that replaces existing integratedcircuits due to advances in semiconductor technology, one or moreembodiments of the present disclosure may also be implemented usingthese new integrated circuit technologies.

The skilled in the art will understand that the present disclosureincludes devices that are involved in performing one or more of theoperations described in the present disclosure. These devices may bespecially designed and manufactured for the required purposes, or mayalso include known devices in general purpose computers. These deviceshave computer programs stored thereon that are selectively activated orreconfigured. Such computer programs may be stored in a device (e.g., acomputer) readable medium or in any type of medium suitable for storingelectronic instructions and coupled to a bus, including but not limitedto any types of disks, including a floppy disk, a hard disk, an opticaldisk, a CD-ROM, and a magneto-optical disk, a ROM (Read-Only Memory), aRAM (Random Access Memory), an EPROM (Erasable Programmable Read-OnlyMemory), an EEPROM (Electrically Erasable Programmable Read-OnlyMemory), a flash memory, a magnetic card, or a light card. That is, areadable medium includes any medium that stores or transmits informationin a readable form by a device (e.g., a computer).

The skilled in the art can understand that each block of thesestructural diagrams and/or block diagrams and/or flowcharts, andcombinations of blocks in these structural diagrams and/or blockdiagrams and/or flowcharts may be implemented by computer programinstructions. The skilled in the art can understand that these computerprogram instructions can be provided to a processor of a general-purposecomputer, a professional computer, or a processor for other programmabledata processing method, so that the schemes specified in one or moreblocks of the structural diagrams and/or block diagrams and/orflowcharts may be executed by the processor of the computer or thecomputer for other programmable data processing method.

The skilled in the art can understand that various operations, methods,steps, measures, and schemes that have been discussed in the presentdisclosure can be alternated, changed, combined, or deleted. Further,various operations, methods that have been discussed in the presentdisclosure, and other steps, measures, and schemes in the process canalso be alternated, changed, rearranged, decomposed, combined, ordeleted. Further, various operations, methods, steps, measures, andschemes in the prior art and those disclosed in the present disclosuremay also be alternated, changed, rearranged, decomposed, combined, ordeleted.

The foregoing descriptions are merely some of the embodiments of thepresent disclosure. It should be noted that for the skilled in the art,a number of improvements and modifications may be made without departingfrom the principle of the present disclosure. These improvements andmodifications should also fall within the protection scope of thepresent disclosure.

It can be understood for those skilled in the art that each block of thestructure charts and/or block diagrams and/or flowchart illustrations,and combinations of blocks in the structure charts and/or block diagramsand/or flowchart illustrations, can be implemented by computer programinstructions. It can be understood for those skilled in the art that thecomputer program instructions may also be provided to a general purposecomputer, a special purpose computer or other processor capable ofprogramming data processing method for implementation, such that schemesspecified in one or more blocks of the structure charts and/or blockdiagrams and/or flowchart illustrations are implemented by a computer orother processor capable of programming data processing method.

Wherein, each module of the device of the present disclosure may beintegrated into one body or separately. The above modules can becombined into one module, and can be further split into multiplesub-modules.

Those skilled in the art may understand that the accompanying drawingsare merely schematic diagrams of a preferred embodiment, and the modulesor processes in the accompanying drawings are not necessarily requiredto implement the present disclosure.

A person skilled in the art may understand that the modules in theapparatuses in the embodiments may be distributed in the apparatuses inthe embodiments as described in the embodiments, and correspondingchanges may be performed in one or more apparatuses different from thepresent embodiment. The modules in the foregoing embodiments may becombined into one module, or further divided into multiple sub-modules.

The above serial numbers of the present disclosure are merely for thepurpose of description and do not represent the advantages anddisadvantages of the embodiments.

The above disclosures are only specific embodiments of the presentdisclosure, but the present disclosure is not limited thereto, and anychanges that those skilled in the art can think of should fall in theprotection scope of the present disclosure.

Methods according to embodiments stated in claims and/or specificationsof the present disclosure may be implemented in hardware, software, or acombination of hardware and software.

When the methods are implemented by software, a computer-readablestorage medium for storing one or more programs (software modules) maybe provided. The one or more programs stored in the computer-readablestorage medium may be configured for execution by one or more processorswithin the electronic device. The at least one program may includeinstructions that cause the electronic device to perform the methodsaccording to various embodiments of the present disclosure as defined bythe appended claims and/or disclosed herein.

The programs (software modules or software) may be stored innon-volatile memories including a random access memory and a flashmemory, a read only memory (ROM), an electrically erasable programmableread only memory (EEPROM), a magnetic disc storage device, a compactdisc-ROM (CD-ROM), digital versatile discs (DVDs), or other type opticalstorage devices, or a magnetic cassette. Alternatively, any combinationof some or all of the may form a memory in which the program is stored.Further, a plurality of such memories may be included in the electronicdevice.

In addition, the programs may be stored in an attachable storage devicewhich is accessible through communication networks such as the Internet,Intranet, local area network (LAN), wide area network (WAN), and storagearea network (SAN), or a combination thereof. Such a storage device mayaccess the electronic device via an external port. Further, a separatestorage device on the communication network may access a portableelectronic device.

In the above-described detailed embodiments of the present disclosure, acomponent included in the present disclosure is expressed in thesingular or the plural according to a presented detailed embodiment.However, the singular form or plural form is selected for convenience ofdescription suitable for the presented situation, and variousembodiments of the present disclosure are not limited to a singleelement or multiple elements thereof. Further, either multiple elementsexpressed in the description may be configured into a single element ora single element in the description may be configured into multipleelements.

While the present disclosure has been shown and described with referenceto certain embodiments thereof, it will be understood by those skilledin the art that various changes in form and details may be made thereinwithout departing from the scope of the present disclosure. Therefore,the scope of the present disclosure should not be defined as beinglimited to the embodiments, but should be defined by the appended claimsand equivalents thereof.

Although the present disclosure has been described with an exemplaryembodiment, various changes and modifications may be suggested to oneskilled in the art. It is intended that the present disclosure encompasssuch changes and modifications as fall within the scope of the appendedclaims.

The invention claimed is:
 1. A method performed by a user equipment (UE)in a wireless communication system, the method comprising: receiving,from a base station, random access configuration information includinginformation of random access configuration index indicating a preambleformat among a plurality of formats; identifying a delta-preamble valuebased on the preamble format and a subcarrier spacing; determiningtransmission power for physical random access channel (PRACH) based onthe identified delta-preamble value; and transmitting, to the basestation, a random access preamble based on the transmission power forPRACH.
 2. A method performed by a base station (BS) in a wirelesscommunication system, the method comprising: transmitting, to a userequipment (UE) random access configuration information includinginformation of random access configuration index indicating a preambleformat among a plurality of formats; and receiving, from the UE, randomaccess preamble based on a transmission power for physical random accesschannel (PRACH), wherein the transmission power for PRACH is associatedwith a delta-preamble value, and wherein the delta-preamble value isassociated with the preamble format and a subcarrier spacing.
 3. Anapparatus of a user equipment (UE) in a wireless communication system,the apparatus comprising: a transceiver; and at least one processoroperatively coupled with the transceiver, and configured to: transmit,to a UE, including information of random access configuration indexindicating a preamble format among a plurality of formats, and receive,from the UE, a random access preamble based on a transmission power forphysical random access channel (PRACH), wherein the transmission powerfor PRACH is associated with a delta-preamble value, and wherein thedelta-preamble value is associated with the preamble format and asubcarrier spacing.
 4. An apparatus of a user equipment (UE) in awireless communication system, the apparatus comprising: a transceiver;and at least one processor operably coupled with the transceiver, andconfigured to: receive, from a base station, random access configurationinformation including information of random access configuration indexindicating a preamble format among a plurality of formats, identify adelta-preamble value based on the preamble format and a subcarrierspacing, determine transmission power for physical random access channel(PRACH) based on the identified delta-preamble value, and transmit, tothe base station, random access preamble based on the transmission powerfor PRACH.
 5. The apparatus of claim 4, wherein the delta-preamble valueis identified as one of 0, 3, 5, 8, 11 decibel (dB), if the subcarrierspacing is 15 kilohertz (kHz).
 6. The apparatus of claim 4, wherein thedelta-preamble value is identified as one of 3, 6, 8, 11, 14 dB, if thesubcarrier spacing is 30 kHz.
 7. The apparatus of claim 4, wherein thedelta-preamble value is identified as one of 6, 9, 11, 14, 17 dB, if thesubcarrier spacing is 60 kHz.
 8. The apparatus of claim 4, wherein thedelta-preamble value is identified as one of 9, 12, 14, 17, 20 dB, ifthe subcarrier spacing is 120 kHz.
 9. The method of claim 1, wherein thedelta-preamble value is identified as one of 0, 3, 5, 8, 11 decibel(dB), if the subcarrier spacing is 15 kilohertz (kHz).
 10. The method ofclaim 1, wherein the delta-preamble value is identified as one of 3, 6,8, 11, 14 dB, if the subcarrier spacing is 30 kHz.
 11. The method ofclaim 1, wherein the delta-preamble value is identified as one of 6, 9,11, 14, 17 dB, if the subcarrier spacing is 60 kHz.
 12. The method ofclaim 1, wherein the delta-preamble value is identified as one of 9, 12,14, 17, 20 dB, if the subcarrier spacing is 120 kHz.
 13. The method ofclaim 2, wherein the delta-preamble value is identified as one of 0, 3,5, 8, 11 decibel (dB), if the subcarrier spacing is 15 kilohertz (kHz).14. The method of claim 2, wherein the delta-preamble value isidentified as one of 3, 6, 8, 11, 14 dB, if the subcarrier spacing is 30kHz.
 15. The method of claim 2, wherein the delta-preamble value isidentified as one of 6, 9, 11, 14, 17 dB, if the subcarrier spacing is60 kHz.
 16. The method of claim 2, wherein the delta-preamble value isidentified as one of 9, 12, 14, 17, 20 dB, if the subcarrier spacing is120 kHz.
 17. The apparatus of claim 3, wherein the delta-preamble valueis identified as one of 0, 3, 5, 8, 11 decibel (dB), if the subcarrierspacing is 15 kilohertz (kHz).
 18. The apparatus of claim 3, wherein thedelta-preamble value is identified as one of 3, 6, 8, 11, 14 dB, if thesubcarrier spacing is 30 kHz.
 19. The apparatus of claim 3, wherein thedelta-preamble value is identified as one of 6, 9, 11, 14, 17 dB, if thesubcarrier spacing is 60 kHz.
 20. The apparatus of claim 3, wherein thedelta-preamble value is identified as one of 9, 12, 14, 17, 20 dB, ifthe subcarrier spacing is 120 kHz.